Answer:
I think it's cell wall and chloroplasts
Bottleneck events lead to _______. a. population growth b. an increase in inbreeding c. an enrichment of dominant genetic traits d. a reduced rate of species mutation please select the best answer from the choices provided a b c d
Answer:
d
Explanation:
Negative feedback loops are positive feedback loops are
(1 point)
O dangerous; beneficial
O painful; pleasurable
O slow; fast
O inhibitory; stimulator
Negative feedback loops are slow, Positive feedback loops are fast.
Negative feedback loops- When a system's output reduces or dampens the processes that result in its output, the system produces less output. This is known as negative feedback. Negative feedback loops typically enable systems to self-stabilize (slow). A crucial regulating mechanism for maintaining the body's homeostasis is negative feedback.
Positive feedback loops- Loops with positive feedback, where changes in one direction lead to more changes in the same direction. For instance, as a substance's concentration rises, a feedback loop results in further concentration rises.
Homeostasis- All bodily systems must be in a condition of balance for the body to live and work properly.
To know more about the feedback loops, click on the below link,
https://brainly.com/question/10318571
#SPJ1
Which of the following is NOT a true statement?
A. Metaphase is the second step of meiosis
B. Anaphase is the third phase of mitosis
C. Telophase is the last phase of mitosis
D. Metaphase is easy to recognize
According to the research, the correct option is D. "Metaphase is easy to recognize" is NOT a true statement.
What is Metaphase?It is the phase in which the chromosomes (or tetrads in the first meiotic division) are placed in the equatorial plane of the spindle, this being the second phase of cell division.
In this sense, it is necessary to observe morphological aspects to use the optical microscope to observe the tension of the spindle fibers aligns the tetrads in the equator of the cell , in this way it is observed how the spindle fibers join the kinetochores.
Therefore, we can conclude that according to the research, the correct option is D. "Metaphase is easy to recognize" is NOT a true statement.
Learn more about Metaphase here: https://brainly.com/question/11637153
#SPJ1
If the mitochondria and chloroplasts in eukaryotic cells resulted from endosymbiosis between various prokaryotes, what features should these organelles have?.
Answer:
tkzzykysosy6dsoytoztksita
xylem contains specialized cells that provide support for a plant stem. how does the structure of one of these cells help ur carry out this function ?
The structure of one of these cells help carry out this function as it has tiny openings.
How is a xylem cell specialized for this function?Water is specifically transported by the xylem up a plant's stem and into its leaves. Dead xylem cells that are connected together form the xylem vessels. Dead cells' end walls are broken, allowing water to pass through. The xylem cells' cell walls are strengthened by a substance known as lignin.
In order for the xylem to form a continuous, hollow tube, the cells that make up the xylem lose their end walls. The substance lignin helps to strengthen them. Lignin provides the plant with sturdiness and stability.
To know more about xylem cells :
https://brainly.com/question/18830324
#SPJ9
The early united states population was predominantly protestant. In the nineteenth century, urban populations became increasingly roman catholic, especially in the cities of the northeastern united states. This shift in the pattern of religion was caused by?.
The early United States population was predominantly protestant. In the nineteenth century, urban populations became increasingly roman catholic, especially in the cities of the northeastern United States. This shift in the pattern of religion was caused by b. international migration from Ireland, southern Germany, and Italy.
Protestantism is a sub-form of the Christian religion, that became common within Western Christianity. The people of the early United States predominantly were protestant.
However, in the middle of the nineteenth century, people from Italy, Germany, and Ireland migrated to the United States due to crises in their countries or for finding better jobs.
These people, who migrated to the United States, were majorly Roman Catholic. Hence, as more and more people migrated to the northeastern United States, the religion changed from Protestantism to Roman Catholicism in the urban areas.
Although a part of your answer is missing, you might be referring to this question:
The early United States population was predominantly Protestant. In the nineteenth century, urban populations became increasingly Roman Catholic, especially in the cities of the Northeastern United States. This shift in the pattern of religion was caused by
a)internal rural to urban migration from farming areas of the Eastern United States
b)transnational migration from Ireland, southern Germany, and Italy
c)transnational migration from Latin America and the Caribbean
d)religious conversion of urban residents
e)out-migration of protestants to rural farming areas of the Midwestern United States
To learn more about United States, click here:
https://brainly.com/question/3358570
#SPJ4
I am a non-flowering vascular plant. I originated in humid forests and swamps. I do not grow from seeds. I grow from spores.
Answer:
ferns, mosses, liverworts, hornworts, lycophytes, and liverworts
Explanation:
Non-flowering plants, known as gymnosperms or conifers, can nonetheless generate seeds.
When protein consumption is in excess of body needs and energy needs are met, the excess amino acids are metabolized and the energy in the molecule is.
When protein consumption is in excess of body needs and energy needs are met, the excess amino acids are metabolized and the energy in the molecule is stored as fat.
Proteins are essential components of cells and are primary sources of amino acids.
For the human body, proteins are vital elements as they not only repair damaged and broken cells but also manufacture new ones.
Moreover, proteins are necessary for teenagers, pregnant women, and children as they help promote growth and development.
However, if proteins are consumed more than the requirement of body needs then their excessive amount is stored as fat while the residues of amino acids are discharged from the body.
If you need to learn more about protein click here:
https://brainly.com/question/884041
#SPJ4
a single stranded dna (oligonucleotides) can hybridize with (select one): select one: a. complementary dna b. complementary rna c. complementary protein d. a and b
A single stranded DNA (oligonucleotides) can hybridize with (d) both complementary DNA and complementary RNA.
DNA is the Deoxyribonucleic Acid. It is the genetic material present in majority of organisms. The nitrogenous bases present in DNA are: Adenine, thymine, Guanine and Cytosine. DNA is a double stranded structure hence it forms hydrogen bonds with a complementary strand. The complementary strand can be of a DNA or RNA.
RNA is the Ribonucleic Acid. It also is a genetic material present in very few organisms. RNA is less stable than the DNA and may be either single stranded or double stranded. The nitrogenous bases of RNA are: Adenine Uracil, Guanine and Cytosine.
To know more about DNA and RNA, here
brainly.com/question/3540768
#SPJ4
As a class project, Mrs. Wilson had the students collect data for the amount of seeds the class pet birds ate daily. Both birds were given the same amount of food daily. The students submitted that graph below. What should the label be for the y-axis of this graph? The y-axis is the independent variable and should be labelled days. , Not Selected The y-axis is the dependent variable and should be labelled amount of food eaten. , Not Selected The y-axis is the dependent variable and should be labelled type of dogs. , Not Selected Incorrect answer: The y-axis is the independent variable and should be labelled time.
The correct option from the question is B ( The y-axis is the dependent variable and should be labelled amount of food eaten. )
What is a dependent variable?The dependent variable is the variable that is being measured or tested in an experiment.
For example in the study above, we are at the looking at the amount of seeds the class pet birds ate daily. The dependent variable would be the the amount of seeds the class pet birds ate daily since that is what is being measured.
The correct option from the question should then be B ( The y-axis is the dependent variable and should be labelled amount of food eaten. )
One way to help identify the dependent variable is to have it in mind that it depends on the independent variable.
When researchers make changes to the independent variable, they then measure any resulting changes that may occur to the dependent variable.
Learn more about dependent variable at: https://brainly.com/question/25223322
#SPJ1
Experiment 4: Mouthwash
Scientists wanted to determine the most effective mouthwash. They had three groups of volunteers. One group used 10 mL of Listerine mouthwash, one group used 10 mL of ACT mouthwash and one group used 10 mL of water. All participants ate the same foods the day of the experiment and swished the mouthwash for 30 seconds. The scientist took a swab of the inside right cheek of each participant. After 24-hours the scientist counted the number of bacterial colonies that formed on a Petri dish from the mouth swab.
What is the independent variable and dependent variable? How do you know?
The independent variable of an experiment is the variable that is changed or manipulated in a series of experiments.
On the other hand, the dependent variable is the variable or outcome that is measured to see the effectiveness of the treatment
According to this question, scientists wanted to determine the most effective mouthwash. They had three groups of volunteers.
One group used 10 mL of Listerine mouthwashOne group used 10 mL of ACT mouthwashOne group used 10 mL of waterAfter 24-hours, the scientist counted the number of bacterial colonies that formed on a Petri dish from the mouth swab.
This suggests that the independent variable is the different mouthwash used while the dependent variable is the number of bacterial colonies.
Learn more about independent and dependent variable at: https://brainly.com/question/1479694
#SPJ1
If an amino acid does not contain an ionizable side chain, its net charge at physiological ph will be:________
The net charge (at physiological pH) on an amino acid which does not contain an ionizable side chain will be zero.
Amino acids contain both a carboxylic group (-COOH) as well as an amino group (-NH₂) . Both these functional groups are joined to a single carbon atom, i.e. α-carbon. Amino acids are the building blocks of proteins.
Both the functional groups present in an amino acid have the ability to form their respective ions in the solution. At physiological pH, i.e. pH = ~7.4, the amino group accepts a H⁺ ion and becomes protonated (-NH₃⁺) whereas, the carboxyl group loses H⁺ ion to form a negatively charged ion (-COO⁻ ).
Due to the existence of both, a positive as well as a negative charge at the same time, the net charge becomes zero.
To learn more about amino acid here
https://brainly.com/question/14583479
#SPJ1
I need help please also its not biology its science but it wont let me put it
Metals participate in two types of single-displacement reactions. A reactive metal can displace _____ gas either from water or from an aqueous acid. A _____ reactive metal can also displace the ion of a _____ reactive metal from solution.
Metals participate in two types of single-displacement reactions. A reactive metal can displace H₂ gas either from water or from an aqueous acid. A more reactive metal can also displace the ion of a less reactive metal from solution. Hence, option C is the correct response.
A single replacement reaction, also known as a single displacement reaction, occurs when one element in a molecule is swapped out for another. Starting ingredients are always pure elements combined with an aqueous compound, such as pure hydrogen gas or zinc metal. A new aqueous compound and a different pure element will be produced as products when a replacement reaction takes place.
Here is another question with an answer similar to this about single-displacement reaction: https://brainly.com/question/3172917
#SPJ4
Question correction:
Metals participate in two types of single-displacement reactions. A reactive metal can displace __________ gas either from water or from an aqueous acid. A __________ reactive metal can also displace the ion of a __________ reactive metal from solution.
a. H₂; less; more
b. O₂; more; less
c. H₂; more; less
d. O₂; less; more
explain why the following statements are false. a. feedback inhibition is defined as a mechanism of down-regulating enzyme activity by the accumulation of a product earlier in the pathway. b. protein phosphorylation is another way to alter the conformation of an enzyme and serves exclusively as a mechanism to increase enzyme activity.
False. Feedback inhibition occurs when an enzyme acting early in a pathway is inhibited by the accumulation of a product late in the pathway
What is inhibition ?Inhibition is the conscious or unconscious restriction or restraint of a process or behavior, especially of urges or wants. The ability to inhibit oneself from acting on some impulses, such as the desire to hit someone in a fit of rage, and to delay the satisfaction of pleasurable activities allows one to perform vital social functions. When two desires are perceived that are in conflict, conscious suppression often occurs in daily life (e.g., the desire to eat a rich dessert versus the desire to lose weight).
According to psychoanalytic theory, inhibition serves as a mediator between the id and the superego, or conscience, and is largely unconscious (primitive desires). The socially imposed inhibitions known as taboos, such as those prohibiting incest or murder, are elevated to the level of moral prohibition.
To learn more about inhibition from the given link:
https://brainly.com/question/13661646
#SPJ4
Many people were catching a communicable disease called "Ugo". Most of these people were very sick and took 7 to 9 days to recover. Investigations directed by Dr. Kleinenstein had revealed that Ugo was caused by a pathogenic bacteria, Ugot diarrhea.
Kleinenstein had recently read in the 'Journal of Biochemistry' that an antibiotic called "norunium" was observed to kill the Ugo bacteria
After receiving permission from the appropriate government agencies Kleinenstein was ready to conduct an experiment on human subjects.
Tablets were prepared containing the antibiotic norunium. A second batch of tablets containing none of this antibiotic were also prepared (tablets containing no medication are called 'placebos').
1. What is Kleinstein’s probable hypothesis? State as an “if.. then…” statement”
Answer:
If norunium can kill the Ugo bacteria, then norunium tablets when ingested should see to a reduction of Ugo bacteria in the body.
Explanation:
Kleinenstein is basing his experiment based on the results of another (group of) scientist(s) that found that norunium can eliminate the Ugo bacteria. Based on "reproducibility and replicability", Ugo should, with the same steps, come to the same result as the scientist(s) who found that "norunium" can kill the Ugo bacteria.
One thing to note, is that if Kleinenstein is to re-test the experiment, generally there would be a step to see the effects of the antibiotics on animals first, before moving to human subjects.
Learn more about experiments, here:
https://brainly.com/question/17907072 - What should the scientist do to best gain scientific understanding of this topic?
the main source of energy for our plants is
Answer:
sunlight brainliest please
Answer:
The main source of energy for plants is of course from the sun. Solar energy aka sunlight is emitted by the sun and that is basically fuel for plants to grow and develope.
Explanation:
Early in the 20th century large areas of temperate forestland in the united states were cleared to make way for agricultural land, for each unit of this forest area that was cleared and replaced by farmland about how much npp was lost
6000 npp was lost for each unit of forest area that was cleared
NPP is the pace at which producers employ photosynthesis to make and store chemical energy, less the rate at which they utilise some of this stored chemical energy via aerobic respiration. NPP evaluates how quickly producers can generate the chemical energy stored in their tissue and possibly accessible to other organisms (consumers) in an ecosystem. It is also described as the difference between the energy fixed by autotrophs and their respiration, and it is typically equated to biomass increments per unit of land surface and time.
During the 1980s and 1990s, global agricultural growth carved a vast swath across tropical forests. According to Stanford researcher Holly Gibbs, more than half a million square miles of new farmland - an area approximately the size of Alaska - was developed in the developing world between 1980 and 2000, with more than 80 percent cleared out of tropical forests.
To learn more about NPP. Click, https://brainly.com/question/15799754
#SPJ4
antibiotics that target cell wall synthesis ultimately cause bacterial cell death as a result of antibiotics that target cell wall synthesis ultimately cause bacterial cell death as a result of plasmolysis. decreased synthesis of plasma membrane. cell shrinkage. inhibition of molecular transport. osmotic lysis.
Antibiotics that target cell wall synthesis ultimately cause bacterial cell death as a result of osmotic lysis.
Interactions between antibiotic drugs and their intended targets and the corresponding direct effects are typically well understood. The bacterial reactions to antibiotic medication treatments, on the other hand, that cause cell death are less well understood and have shown to be highly complicated, including numerous genetic and metabolic processes. Here, we discuss the complex impacts of drug-target interactions, including the critical cellular functions that bactericidal antibiotics impede and the related cellular responses that support bactericidal antibiotic death.We also go over recent discoveries about these mechanisms that have come from the study of biological networks and explain how these discoveries, along with associated advancements in synthetic biology, may be used to generate brand-new antibacterial drugs.To learn more about Antibiotics.
brainly.com/question/10868637
#SPJ4
What type of infection do you use antibiotics for? What type of infections do you use vaccines for?
in imprinting, allelic expression is based on which parent the allele came from. the physical location of a gene in relation to other genetic material is known as .
In imprinting, allelic expression is based on which parent the allele came from. the physical location of a gene in relation to other genetic material is known as Position effect.
A multicellular creature's somatic cells have similar genetic material, which regulates the composition of the organism. Since the genetic material can duplicate alongside the cell, new cells inherit the same genetic makeup as their parent cells.Plasmids are a type of genetic material that can be found. Certain bacteria have genetic material called plasmids that can be discovered outside of their chromosomes.The fundamental structural and operational component of heredity is a gene. DNA is the component of genes. Many genes do not, however, code for proteins. A few hundred DNA bases to more than 2 million bases make up a gene in a human.To learn more about allele.
brainly.com/question/14206531
#SPJ4
If the mitochondria and chloroplasts in eukaryotic cells resulted from endosymbiosis between various prokaryotes, what features should these organelles have?.
If the mitochondria and chloroplasts in eukaryotic cells resulted from endosymbiosis between various prokaryotes, then these features should have A.a plasma membrane, DNA, and ribosomes.
According to the theory of endosymbiosis, structures such as mitochondria and chloroplasts were initially produced as prokaryotes. When these prokaryotes were engulfed by larger prokaryotes, then with the passage of time these became organelles of eukaryotic cells.
The presence of plasma membrane, DNA and ribosomes are the features that represent that the chloroplast and mitochondria could initially be prokaryotes. These structures can replicate themselves as they have their own DNA, they had ribosomes for the making of proteins and the plasma membrane that enclosed these cells. Hence, the presence of DNA, ribosomes, and plasma membrane indicates that the mitochondria and chloroplast were individual cells before.
Although a part of your question is missing, you might be referring to this question:
If the mitochondria and chloroplasts in eukaryotic cells resulted from endosymbiosis between various prokaryotes, what features should these organelles have?
A.a plasma membrane, DNA, and ribosomes
B.a plasma membrane, nucleus, and ribosomes
C.nucleus, DNA, and ribosomes
D.a plasma membrane, nucleus, and cilia
E.nucleus, ribosomes, and cilia
To learn more about endosymbiosis, click here:
https://brainly.com/question/1698852
#SPJ4
Which of the following is not part of the cell theory? (4 points) Group of answer choices Every living thing is composed of cells. Cells come from pre-existing cells. Cells are the basic unit and structure of all living things. Every cell has a nucleus that contains genetic material.
The claim that each cell includes a nucleus that houses genetic material is not included in the cell theory.
THEORY OF CELLS:
A widely accepted theory that depicts life as a function of the cell is called the cell theory. Three scientists, Rudolf Virchow, Mathias Scleiden, and Theodor Schwann, developed the cell hypothesis in the 1890s.
The following three things make up the cell theory:
• All living things are built around their basic unit, the cell.
• At least one cell makes up every living creature.
• Every cell develops from an earlier cell.
Thus, the claim that is not supported by the theory of the cell is that each cell has a nucleus that houses genetic material. So, option D is the correct answer.
Learn more about Cell Theory:
https://brainly.com/question/17934269
#SPJ9
In which part of the cell cycle do the mitotic spindles assemble, bind to chromosomes, and move the sister chromatids apart?
Select one:
a.
cytokinesis
b.
G2 phase
c.
M phase
d.
S phase
C. During M Phase.
M phase - When a cell is in the M phase, it divides, first through nuclear division (mitosis), then through cytoplasmic division (cytokinesis). The DNA is replicated in the earlier S phase, and cohesins keep each replicated chromosome's two copies (known as sister chromatids) bound to one another.
Mitosis is divided into four stages
ProphaseMetaphaseAnaphaseTelophaseAfter metaphase , in which the chromosomes align at the equator, comes the Anaphase in which when the sister chromatids of each chromosome separate and move to the opposing poles of the cell. This separation results from the breakdown of cohesin, the protein that held the sister chromatids together during prophase, by enzymes. Every chromatid splits out to produce a separate chromosome.
Hence, during Anaphase of M phase sister chromatids move apart.
To learn more about cell cycle refer- https://brainly.com/question/5034994
#SPJ9
Do the usage of synthetic hormones for the modification of plant growth have any environmental implications?
Answer:
Yes, the usage of synthetic hormones for the modification of plant growth can have environmental implications.
1. One environmental implication is that it can lead to the development of herbicide-resistant weeds. If farmers are using synthetic hormones to make their crops grow faster, the weeds around the crops will also be exposed to the synthetic hormone and over time, they will develop a resistance to it.
2. Another environmental implication is that it can lead to soil contamination. If the synthetic hormone is not properly contained, it can leach into the soil and contaminate it. This can cause harm to other plants and animals that come in contact with the contaminated soil.
3. One final environmental implication is that it can disrupt the natural growth cycle of plants. By artificially manipulating the plant's hormones, farmers can make the plants mature faster. However, this can interfere with the plant's natural life cycle and cause problems in subsequent growing seasons.
What are synthetic hormones for plants?
Synthetic hormones for plants are chemicals that are added to the soil or sprayed on the plants to alter their growth.
Explanation:
Let me know if you need elaborating on anything and give me Brainliest if that helped :)
a one-million-year-old skull bearing traits associated both with homo erectus and, in addition, homo sapiens has been found in the afar region of eritrea, and indicates that modern humans developed much earlier than previously thought.
A one-million-year-old skull bearing traits associated both with homo erectus and, in addition with both Homo erectus and Homo sapiens has been found in the Afar region of Eritrea, indicating.
Homo sapiens is a term used to describe all modern humans. Nearly 200,000 years ago, in conjunction with early Neandertal technology, our species of humans initially started to evolve. It is now known that early Homo sapiens, or modern humans, lived with Neandertals rather than emerging later. However, it seems likely that Homo heidelbergensis was the common ancestor of both modern humans and Neandertals.Modern humans often have more delicate skeletons than Neandertals and other late archaic humans. The occipital buns seen on the rear of Neandertal skulls are uncommon in them. They also have smaller features, pointy chins, and relatively high foreheads.To learn more about Homo sapiens.
brainly.com/question/10169640
#SPJ4
According to the most recent report by the united nations, the world is on track to reach sustainable goal #6 on clean water and sanitation by the deadline set for 2030. True or false?.
The statement "According to the most recent report by the united nations, the world is on track to reach sustainable goal #6 on clean water and sanitation by the deadline set for 2030." is false.
According to a UN report, the world is not on track to complete Sustainable Development Goal 6 (SDG 6) on water and sanitation by the target year of 2030.
Billion people worldwide lack access to clean water, sanitary facilities, and handwashing stations. The budget for water and sanitation services is insufficient, and ecosystems and water sources are getting more contaminated. Furthermore, governance and delivery mechanisms are ineffective and disjointed.
The report is based on the eleven SDG 6 global indicators' most recent data. The study, which represents a consensus stance from the United Nations family, provides direction for comprehending worldwide progress on SDG 6 and its connections to other goals and targets.
Here is another question with an answer similar to this about sustainable goals: https://brainly.com/question/14439115
#SPJ4
What are the main components of the central nervous system?
The central nervous system is made up of the brain and spinal cord. The peripheral nervous system is made up of nerves that branch off from the spinal cord and extend to all parts of the body.
Identify the dependent (responding) variable in this experiment. For crickets
The dependent variable in the experiment is the stridulation of the chirping of the crickets.
What are the dependent variables?The variable that alters when the independent variable does is known as the dependent or responsive variable. It is the sound of the cricket in this instance.
In an experiment, there are three different kinds of variables. These variables serve as controls, dependents, and independents.
Melissa's experiment in this case involves a cricket chirping as the temperature rises. Chirping will be the dependent variable.
Therefore, the dependent variable is the stridulation of the sound of the crickets.
To learn more about dependent variables, refer to the link:
https://brainly.com/question/1479694
#SPJ1
The question is incomplete. Your most probably complete question is given below:
Melissa raises crickets at her pet store that she sells for reptile food. She thinks that crickets chirp more often when the temperature gets warmer. She decides to conduct an experiment to prove her theory.
why does the brain have fat tissue and blood vessels? (1 point)
to receive nerve impulses from other body parts and interpret them
to interpret nerve impulses from other body parts and send responses
to protect and nourish the brain cells
to store information
The brain has fat tissue and blood vessels to protect and nourish the brain cells, which need blood vessels to receive nutrients (Option c is correct).
What is brain tissue?Brain tissues are different types of tissues that are mainly composed of neuronal cells, glial cells and endothelial cells, which contain associated tissues such as fat tissue and blood vessels.
In brain tissue, the blood vessels help to transport nutrients such as Oxygen, which is required to carry put the cellular respiration, and fat tissue required to electrically isolate these cells and provide energy storage when required accordingly. All these tissues work together to conduct electrical impulses (i.e. nerve impulses) in the brain.
In conclusion, the brain has fat tissue and blood vessels to protect and nourish the brain cells, which need blood vessels to receive nutrients (Option c is correct).
Learn more about the brain cells here:
https://brainly.com/question/1247675
#SPJ1