Answer:
True
Explanation:
The point where the separation of the DNA occurs is called the replication fork. Therefore, it is true.
What is a replication fork?The DNA double helix of a cell has been unwound and split into the replication fork, which is where DNA polymerases and other enzymes can work.
DNA helicases unwind DNA at locations known as origins during DNA replication, where synthesis will begin. The replication fork, so named because the two strands of DNA seem forked as they are unzipped apart, is a structure that is created while DNA helicase proceeds to unwind the DNA.
A replication bubble is created when the circular bacteria chromosome's double-stranded DNA is opened at the point of replication. A replication fork, a Y-shaped junction where double-stranded DNA is split into two single strands, is present at each end of the bubble. Therefore, it is true.
Learn more about replication fork, here:
https://brainly.com/question/13543444
#SPJ6
Which of the following scenarios can be classified as a negative feedback loop?
a increase in blood pressure to reduce heart rate
b increase in testosterone to help increase a fight-or-flight response
c increase in oxytocin caused by increased contractions
d increase in platelet production to help increase blood clotting
Answer:
The scenario that can be considered an example of a negative feedback loop is increase in platelet production to help increase blood clotting (option d).
Explanation:
Negative feedback loop is what occurs when a change occurs in the body, producing a response that decreases or stops that change, with the intention of maintaining homeostasis.
When there is a wound that produces bleeding, a series of mechanisms are activated, the coagulation cascade, which promotes the release of factors that allow the formation of clots. The increased release of platelets implies negative feedback because it helps to stop the change that occurs in the body, the loss of blood, through the formation of clots.
One thing that can cause confusion is the fact that this response also involves positive, though limited, feedback that promotes the production of clotting factors and platelets to increase clot formation. What really happens is that the positive feedback promotes the general feedback, which is the negative feedback: clot formation to stop the bleeding, restoring homeostasis.
The other options are not correct because:
a. Increase in blood pressure to reduce heart rate is not possible.
b. In the fight and flight response the hormones involved are cortisol and adrenaline, not testosterone.
c. Increased oxytocin in response to uterine contractions is positive feedback.
Select the correct answer. Stephan's mother cuts a twig from a rose bush and plants it in the soil. After a few days, Stephan observes a new plant growing. Which characteristic does the growth of the new plant depict? OA asexual reproduction OB meiosis OC photosynthesis D. sexual reproduction
Answer:
A. asexual reproduction
PLEASE HELP!!!! Which of the following were responsible for changing the oxygen content in
Earth's atmosphere from no oxygen to 21% oxygen?
A. Prokaryotes
B. Eukaryotes
C. Ribozymes
D. Protobionts
Im not 100% sure but the best answer I can give is Prokaryotes because they came to be around the time oxygen did as well.
Answer:
prokaryotes
Explanation:
i took the quiz
Which of the following organisms are able to take energy from the sun and make it usable for living things?
A. consumers
B. decomposers
C. omnivores
D. producers
Halp plz T^T
Answer:
Producers
Explanation:
Producers are things like plants and bacteria that use energy from the sun through photosynthesis to get energy
Farmers in a community are complaining that their crops are being damaged by
insects they never had problems with before. Explain what might be causing
this problem
Answer:
Unavailability of biological agent.
Explanation:
The main cause of this problem is the unavailability of biological agent for that insects in that environment. biological agents are the organisms that controls other insects population by feeding on them. When a new insect is introduced in a particular environment and no bioagent is present for it, it greatly damaged the crops and destroys the field of the farmer.
Which numbered organelle produces ATP during cell respiration?
The mitochondria produce ATP during the process of aerobic respiration.
What are mitochondria?
Almost all eukaryotic cells (cells with clearly defined nuclei) have a membrane-bound organelle called a mitochondrion, whose main job is to produce huge amounts of energy in the form of adenosine triphosphate (ATP).
Mitochondria normally have a circular to oval shape and can be anywhere from 0.5 to 10 m in size. In addition to providing energy, mitochondria also create heat, control cell growth and death, and store calcium for cell signaling functions.
As an illustration, human erythrocytes (red blood cells) do not have any mitochondria, but liver cells and muscle cells may have hundreds or even thousands of mitochondria. The oxymonad species Monocercomonoides is the only eukaryotic organism that is known to be mitochondria-free.
Because they contain a unique genome, two separate membranes, and binary fission as a method of reproduction, mitochondria differ from other cellular organelles and may have evolved from prokaryotes (single-celled organisms).
Therefore, the organelle producing the ATP is the mitochondria.
Read more about mitochondria, here
https://brainly.com/question/10688306
#SPJ2
WILL GIVE BRAINLYEST
1. The graph below shows a students walk after school. Use the graph to descrito their walk. Make sure to indate the direction they are waking and the speed scordant, they are credits
in speed, or decreasing in speed. 3 points)
HINT: Think about this student's motion in three steps
A Students After School Walke
2
HURRRYYYYYYY IDK-
Answer:
J'aiderais, mais s'il y avait plus d'informations, je les comprendrais mieux pour moi et pour les autres utilisateurs également.
Explanation:
ლ(´ڡ`ლ)
The picture shows soil that has become compacted.
What is the most likely direct result when soil becomes compacted by human
use?
A. Increased pollution
B. Increased permeability
c. Decreased humus
D. Decreased porosity
Answer:
D, decreased porosity
Explanation:
As soil gets compacted the particles move closer to each other and leave less pore space for water or air between them.
Use the drop down menus to answer the following questions about the lymphatic system.
The main functions of the lymphatic system are
✔ immunity
,
✔ fluid balance
,
✔ fat transportation.
Immunity means protecting the body against
✔ pathogens.
The fluid from the cells is returned to the blood to prevent
✔ swelling
and make sure there is enough water in the
✔ blood.
✔ fat
is/are absorbed into the lymph vessels and returned to the blood.
The main function of the lymphatic system are
immunityFluid balanceFat transportation.What is immunity?
Immunity can be defined as the immune system's way of protecting the body against an infectious disease.
One of the many functions of the lymphatic system is the absorption of nutrients such as fats and fat-soluble vitamins.
The lymphatic system returns excess fluid and proteins from the tissues that cannot return through the blood vessels.
The lymphatic system can be described as a network of vessels, nodes, and ducts whose main aim collect and circulate excess fluid in the body.
The main function of the lymphatic system are
immunityFluid balanceFat transportation.Immunity means protecting the body against pathogens.
The fluid from the cells is returned to the blood to prevent swelling and to make sure there is enough water in the blood. It also maintain normal blood volume and pressure.
Fat is absorbed into the lymph vessels and returned to the blood.
Learn more about immunity at https://brainly.com/question/6612564
#SPJ1
How does the plasma membrane maintain homeostasis?
Answer:
The plasma membrane maintains homeostasis in the cell by keeping cell contents in and foreign material out, and by providing controlled avenues for the transportation of fuel, fluids and waste.
Explanation:
please make my answer as brainelist
What Type of reaction is C12H220
O11->12C + 11h20
a)synthesis
b)decomposition
c)oxidation
d)combustion
please respond asap
When studying cells structure using a microscope the smallest unit of measurement
commonly used to describe findings is the nanometre. Explain why.
Since a nano-metre is the most accurate unit for working with the extremely small cell structure (the majority of cell organelles are between 1 and 1000 nano meters)
Why is it important to measure cell size?The fundamental functions of a cell's physiology, such as flux across membranes, depend on the size of the cell as a whole, which is one reason why cell size matters. Changes in the volume or surface area of a cell will therefore have a significant impact on the metabolic flux, biosynthetic capacity, and nutrient exchange.
Which tool is used to see the smallest units in cells?Under a light microscope, smaller cells are clearly visible. Even internal cell structures like the nucleus, mitochondria, and chloroplasts can be seen. An image is magnified by a system of lenses in light microscopes. Micrometers are used to measure the cell's size. Human red blood cells have a diameter of 7.0 micrometers, while the smallest cell known as Mycoplasma is 0.3 micrometers. Animal and plant cells typically range in size from 10 to 30 microns.
To know more about Mycoplasma :
https://brainly.com/question/13051047
#SPJ9
1) What did you notice about the letter e when you increased in magnification from the 4x to the 10x and then to the 40x:
a) Did the size (magnification) increase or decrease?
b) Could you see more of the entire letter or less?
(Subject science)
Answer:
a) The size(magnification) increased.
b) I could see more of the entire letter.
The size of the magnification was increasing and there was less of the letter visible.
What is magnification?
The action of magnifying something is called magnification. Magnification also refers to enlarging the apparent size and not the actual physical size. This is done for the better observation of something not visible by the unaided eye. This enlargement is quantifiable which means it can be measured.
The magnification of an object when related to its actual size is an important discussion in the study of magnification.
Magnification is simply the act of enlarging an object visually by the utilization of lenses. In this process, the object is not becoming larger physically but only appearing to become larger. Also, this concept is derived from two forms.
The first is by the use of a microscope, which makes small objects appear large and the second is by the use of a telescope, which makes a distant object appear closer and the images are viewed more clearly and more defined.
Therefore, The size of the magnification was increasing and there was less of the letter visible.
Read more about magnification, here
https://brainly.com/question/21370207
#SPJ2
IS NEEDED ASPA
The Median
To calculate the median, in this example, you will need the same set of numbers as above. Only this time, you are going to order the numbers from the least to the greatest. If you do this, this is what you get:
1, 1, 2, 2, 2, 3, 3, 3, 4, 4, 4, 4, 5, 5, 6, 6, 7, 7, 8, 8, 9
We know from the example above that there are 21 numbers in this data set. So, we will look for the middle number, which is 11. There are 10 numbers to the left and 10 numbers to the right. So, the median for this data set is the number 4.
What is the median of the following numbers?
10, 22, 27, 33, 34, 38, 41, 44, 49, 55, 61, 67, 71
38
41
44
Answer:
41 would be the median from the following numbers.
brainliest pls :,)
in the united states doctors often convivne women to have unnecessary hysterectomies because the uterus and overis are potentially disease producing organs
Women need to be aware of gender bias in medicine.
A hysterectomy is a surgical system that eliminates the uterus. You lose the potential to emerge as pregnant and no longer menstruate. Reasons for this surgical treatment include abnormal bleeding, uterine prolapse, fibroids and cancer. Recovery commonly takes 4 to six weeks.
Learn more about hysterectomy here:
https://brainly.com/question/10863665
#SPJ4
Please help me!! what is the probability that a yellow (Y) and wrinkled (r) pea will appear from a cross of RrYy x RrYy?
Answer:
3/16
Explanation:
This question involves two genes coding for pea shape and pea color. The alleles for yellow color (Y) and round seeds (R) are dominant over the alleles for green color (y) and wrinkled seeds (r).
In this cross between two heterozygotes: RrYy × RrYy, the following allele combinations are produced in the gamete of each parent: RY, Ry, rY and ry. Using these gametes in a punnet square (see attached image), the following offsprings are produced:
9/16 of Round, yellow offsprings (R_Y_)
3/16 of Round, green offsprings (R_yy)
3/16 of Wrinkled, yellow offsprings (rrY_)
1/16 of wrinkled, yellow offsprings (rryy)
Hence, the probability that a yellow (Y) and wrinkled (r) pea will appear from a cross of RrYy x RrYy is 3/16.
I need to know what all these things are
ill give a special golden crown!!
I'm pretty sure it's the third option.
Answer: Its the 3rd option
What is the correct amino acid sequence for the given DNA sequence,TACACGTTCACC?
Answer:
ATGTGCAAGTGG
Explanation:
A=T
C=G
G=C
T=A
Hope this helps you out!
the neural communication process usually begins when the axon receives signals from other nearby neurons.
The neural communication process usually begins when the axon receives signals from other nearby neurons. False
Neuronal communication is an electrochemical event. The dendrites is composed receptors for synapses brought thru nearby neurons. diverse synapses are related to several capacities. frequently, highbrow problems encompass lopsided traits in a given synapse framework. medicines can act each as agonists or as foes for a given synapse framework.
Neuron is tremendously specialised mobile that communicates information in electric and chemical form; a nerve cell.
myelin sheath is a white, fatty overlaying wrapped across the axons of some neurons that increases their conversation speed.
resting capability is a country wherein a neuron is ready to prompt and communicate its message if it gets enough stimulation. (-70 millivolts)
To know more about Neuronal communication visit : https://brainly.com/question/2377551
#SPJ4
The lanthanoid elements are:
Brittle and acidic
Synthetic
Soft and malleable
Unreactive
[tex]{ \qquad\qquad\huge\underline{{\sf Answer}}} [/tex]
Lanthanoid elements [ atomic number : 57 - 70 ] are metals that lie below transition metals in periodic table and are very reactive in nature, they are also reffered as rare earth metals, with characteristics like : they are so soft that can be even cut through by knife, and malleable as well, they are mostly paramagnatic.
so, conclusion can be made that the Correct choice is :
C. Soft and Malleable
Explain why a golf ball is heavier than a table-tennis ball, even though the balls are the same size
Why do biologists classify organisms?
Answer:
To make it easier to study.Explanation:
I hope l helped you. Please follow me. ❤❤❤During photosynthesis, plants produce ___ and oxygen from the ___ of solar energy, water, and carbon dioxide.
Answer:
1. Glucose
2. Conversion
Explanation:
During photosynthesis, plants produce glucose and oxygen from the light of solar energy, water, and carbon dioxide. This process is called photosynthesis.
What is photosynthesis?Photosynthesis is a process that takes place in green plants because they have chlorophyll pigment. Chloroplast is the organelle that is present in green plants. This organelle has chlorophyll pigment that carries out the photosynthesis process.
In photosynthesis, water is taken from the soil, carbon dioxide is taken from the atmosphere, and with the help of sunlight, glucose and oxygen are formed in the chloroplast. Due to this, plants are called producers.
Photosynthesis releases oxygen into the atmosphere, which is required by all living organisms. Organisms take in oxygen and release carbon dioxide into the environment. This is called the respiration process.
In the grassland ecosystem, the plants do photosynthesis. In the ocean's ecosystem, phytoplankton do photosynthesis. Different consumers depend on these producers for food.
Hence, plants produce glucose and oxygen from solar light energy, water, and carbon dioxide.
To learn more about photosynthesis, refer to the following link:
https://brainly.com/question/1388366
#SPJ6
How is cellular respiration dependent upon an animal's respiration rate?
Answer:Every cell in an animal requires oxygen to perform cellular respiration. Cellular respiration is the process by which animals take in oxygen and exchange it for carbon dioxide and water as waste products.
Explanation:
Every cell in an animal requires oxygen to perform cellular respiration. Cellular respiration is the process by which animals take in oxygen and exchange it for carbon dioxide and water as waste products.
Cellular respiration is dependent upon an animal's respiration rate because
respiration rate depends on the amount of oxygen inhaled and available to
break down food(cellular respiration).
The oxygen inhaled by animals enter into the cells of the body through the
blood. Carbon dioxide formed in cells is then replaced by the oxygen.
The less the amount of oxygen inhaled during respiration , the less the
cellular respiration that takes place in the animal and vice versa.
The above analysis shows that respiration rate and cellular respiration have
a direct relationship which explains why they are dependent on each other.
Read more on https://brainly.com/question/13601018
Which of the following phrases best describes the function of meiosis?
Your answer:
A. conserves chromosome number, produces genetically identical cells
B. conserves chromosome number, produces haploid cells
C. reduces chromosome number by half, produces diploid cells
D. reduces chromosome number by half, produces gametes
The phrase that best describes the function of meiosis reduces the chromosome number by half and produces gametes. The correct option is D.
What is meiosis?Meiosis is the division of gametic or sex cells. This process occurs during reproduction. It completes in eight stages. It is divided into two parts. Meiosis I and meiosis II.
After meiosis, I, the daughter cells move directly into meiosis II without going through interphase or DNA replication. With the exception of the halving of the number of chromosomes, meiosis II resembles mitosis.
Because it contains the chromosomes of both parents, to make the number of chromosome-specific to humans, its numbers of chromosomes is reduced to make it 46.
Therefore, the correct option is D. reduces the chromosome number by half and produces gametes.
To learn more about meiosis, refer to the link:
https://brainly.com/question/11622266
#SPJ6
I’ve been workin on this assignment for hours and now it’s 1:30am pwees help✨
A scientists puts nucleotide chains of UUUUUU in a test tube under conditions
allowing for protein synthesis. Son the test tube is full of a polypeptide chains
composed of only the amino acid phenylalanine. What does this experiment
indicate?
A. most proteins are composed of only one type of amino acid
B. protein synthesis cannot function in a test tube
C. UUU codes for the amino acid phenylalanine
D. the amino acid phenylalanine is composed of uracil
This experiment indicates that UUU codes for the amino acid phenylalanine (Option C).
The messenger RNA (mRNA) is used as template to create a polypeptide during translation.The triplets of nucleotides or 'codons' in mRNA indicate specific amino acids to the growing polypeptide.The genetic code indicates that the codon UUU codes for phenylalanine.In conclusion, this experiment indicates that UUU codes for the amino acid phenylalanine (Option C).
Learn more in:
https://brainly.com/question/21272924
Psycology please answer i have 100 points for you
People who have low self-esteem and are completely reliant on the support of others are exhibiting which disorder?
Histrionic personality disorder
Schizotypal personality disorder
Dependent personality disorder
Obsessive-compulsive personality disorder
Answer: Dependent personality disorder
Explanation:
Answer:
The answer for this is C. Dependent personality disorder
Explanation:
I took the test and got a 100% on it
what is cryptograms
Answer:
A cryptogram is a type of puzzle that consists of a short piece of encrypted text. Generally the cipher used to encrypt the text is simple enough that the cryptogram can be solved by hand. Substitution ciphers where each letter is replaced by a different letter or number are frequently used.
e. coli are grown on a medium containing lactose. once glucose is added to the medium, the bacteria stop fermenting lactose
The lac operon is an operon required for the transport and metabolism of lactose in E.coli. When lactose is introduced to the increased medium, the lac genes are expressed due to the fact allolactose binds to the Lac repressor protein and maintains it from binding to the lac operator. Allolactose is an isomer of lactose. Small quantities of allolactose are shaped when lactose enters into E. coli. allolactose binds to the repressor protein and reasons the conformational change. As a result of this, the repressor can no longer bind to the operator area and falls off. RNA polymerase can then bind to the promoter and transcribe the lac genes. After some time, when the level of lactose decreases as it is metabolized using enzymes, it causes the synthesis of the repressor from the regulator gene. This repressor binds to the operator gene and prevents RNA polymerase from transcribing the operon and the transcription is stopped. This type of law is acknowledged as negative regulation.
Allolactose is a disaccharide comparable to lactose. It consists of the monosaccharides D-galactose and D-glucose linked thru a β1-6 glycosidic linkage alternatively of the β1-4 linkage of lactose. It may additionally occur from the occasional transglycosylation of lactose through β-galactosidase.
Learn more about Allolactose here:
https://brainly.com/question/14191787
#SPJ4