The total length of the DNA molecule that makes up the human genome is able to fit in one cell because the chromatin is densely compacted into the cell nucleus.
What is chromatin?Chromatin is a complex molecule composed of DNA and associated histone proteins. The nucleosomes allow to compact the DNA molecule, which represent the basic unit of chromatin that consists of DNA (approximately 150 base pairs) and H2A, H2B, H3 and H4 histones.
In conclusion, all the genome of an organism contained in its long DNA nucleotide sequence can be packaged into the cell nucleus in eukaryotic cells because chromatin is highly compacted by using histone proteins that bind to nucleotide bases.
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Primary production is an example of ?
Answer:
Primary production occurs in both terrestrial and aquatic plants as well as in algae, and chemoautotrophs. On land, plants act as primary producers, with examples including lichen, trees, grasses, ferns, mosses, and so forth.
Cell theory states that all living things contain one or more cells. Why do you think cell theory meets the definition of a scientific theory?
The cell theory meets the scientific unified cell theories because still there are living entities which create example for unicellular and multicellular examples.
The cell theory is known as the structural and functional unit of life because it is the smallest unit and without it, life is not possible as the cell contains the nucleus which is the brain of the cell and the unit through which hereditary material is transferred between the generations and also it contains other cell organelles responsible for all kinds of cellular functions and depending upon the number of cell the body can be simple or complex as unicellular organism like amoeba they are very simple and eukaryotes like human , fungi, protists, plants and animals all are multicellular and that is why there body is complex and cell theory meets the definition because the cell is being tested for a longer period of time and also it was given by Robert brown that cell theory are formed from the pre existing cells called as Omnis cellular and there are many theories like big bang theory which suggests that the first cell was formed from the inorganic material and this theory is also called as unified cell theory and Rudolf Virchow gave many postulates to support this theory later.
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Question 10 of 10
Scientific research has led to the discovery of many types
of bacteria and viruses that cause human diseases.
Which statement best describes the impact of this scientific research?
O A. It has a negative impact on society but a positive impact on the
environment as new species are discovered.
B. It harms the environment because it prevents scientists from
researching environmental problems.
C. It has a negative impact on both society and the environment.
D. It benefits society because the research helps scientists develop
new treatments.
Answer: The discovery of viruses paved the way to understanding these mysterious infections. And, although Koch's postulates could not be fulfilled for many of these infections, this did not stop the pioneer virologists from looking for viruses in infections for which no other cause could be found.
Explanation:
Exam-style questions
A student is investigating the effect of different wavelengths of light on photosynthesis.
They use the following equipment:
● a lamp
• coloured light filters
a metre rule
a conical flask
●
0.2% sodium hydrogencarbonate solution
a gas syringe
a sample of pondweed
Plan an experiment to allow the student to collect valid data.
You should identify any control variables.
●
The experiment can be used to investigate the influence of light intensity on the rate of photosynthesis.
Aim:To investigate the influence of light intensity on the rate of photosynthesis.
Procedure: Cut the stem of a bubbling pond weed to around 5cm in length. In a test tube containing sodium hydrogen carbonate solution, place the sliced surface facing upwards.Insert the test tube into the water-filled beaker and record the water's temperature. The temperature of the water in the beaker should be monitored periodically to ensure that it remains steady during the experiment. Connect the gas-collection equipmentPosition the lamp 10 cm from the beaker. Give the plant two to three minutes to acclimate to the light intensity.Place the capillary tube/test tube onto the cut tip of the pondweed when the rate of air bubbles is regular and acceptable (>10 bubbles/minute), and then measure the volume. Alternately, count the bubbles. Get the average of the findings by repeating the process twice.Steps 5 and 6 should be repeated at increasing distances from the light source, such as 20 cm, 30 cm, 40 cm, and 50 cm. Summarize the findings in a table and then graph the oxygen volume per minute OR the number of bubbles per minute versus the distance between the light and the plant.Variables:Light intensity and distance from the light source are independent variables.The number of bubbles created each minute is the dependent variable.Control variables include temperature, the identical piece of Cabomba pondweed used each time, and the sodium hydrogen carbonate solution concentration.ObservationThe amount of oxygen, or the rate of bubble formation, increases as light intensity increases (the distance between the lamp and the plant decreases). This shows that photosynthesis accelerates as the light intensity rises.
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What is “big data” and why do we need statistics to analyze it?
Answer:
Because there is statistics only is the one of the best way to analysis of the ( big data).
Muscles churn the stomach to
break down food.
please help ! What is the main idea, supporting evidence and bold key words help?
Answer:
carbohydrate, fat and protein.
Explanation: these are main building blocks that make up our body.they help in making muscles, provide energy as well as support the body functions.
Which substance is an organic molecule made during photosynthesis? A. Sugar, B. Oygen gas, C. Carbon dioxide, and Water
The organic molecule that is made during photosynthesis is sugar. So the correct option is A. sugar.
What is photosynthesis?Photosynthesis is a chemical process that is carried out in plants and algae in which organic molecules are generated from inorganic matter thanks to the energy that sunlight provides. This sunlight is going to be converted into ATP and NADPH which are going to be used to make carbohydrates.
This process will be generated in organisms that are photoautotrophs, that is, those that use the photons of light to generate organic molecules to be able to feed on them, they do not need external food to survive.
Therefore, we can confirm that the organic molecule that is made during photosynthesis is sugar. So the correct option is A. sugar.
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A scientist observes a Petri dish of bacterial cells with no
magnification, then observes a section of the same Petri
dish under a microscope.
Bacteria Cells Under
a Microscope
Bacteria Cells on
a Petri Dish
Which statement best describes the patterns of distribution observed by the
scientist?
A. A random pattern is observed under magnification, while a
clustered pattern is observed directly.
B. A random pattern is observed under magnification, and a rando
pattern is observed directly.
C. A clustered pattern is observed under magnification, while a
regular pattern is observed directly.
D. A regular pattern is observed under magnification, while a random
pattern is observed directly.
When scientist observe a petri dish of bacterial cells with no magnification they will be appearing random while when observing them closely under a microscope there will be a particular clustered pattern of their organization.
c. A clustered pattern is observed under magnification, while a
regular pattern is observed directly.
Bacteria lives by forming colonies in which the cells are continuously dividing to form new cells and the colony keeps growing.
when observing them with eyes they will be be appearing like random spots. But when observing closely we will be able to observe that these colonies have particular shape, size, color, surface appearance and texture.
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A classification grouping that consists of a number of similar, closely related species?
According to the research, the correct option is genus. A classification grouping that consists of a number of similar, closely related species is called a genus.
What is a genus?It is a taxonomic category that is part of systematic biology, which is located between the family and the species, that is, it includes many species that are related to each other.
In this sense, it is a taxon that allows living beings to be classified based on a hierarchy of inclusion, in this case grouping together closely related species, being a group of organisms that in turn can be divided into several species.
Therefore, we can conclude that according to the research, the correct option is genus. A classification grouping that consists of a number of similar, closely related species is called a genus.
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Which part of the DNA model is most directly associated with the coding of genetic information?
The linear arrangement of nucleotides in DNA contains genetic information. A hydrogen bond between the G-C and A-T base pairs holds each DNA molecule's two complementary strands of nucleotides together to create a double helix. Thus, option D is correct.
What part of DNA code for genetic information?Each sugar group has a nucleotide base, a ringed nitrogen molecule, and it is the arrangement of these bases that encodes the genetic instructions for making proteins.
Genes store the instructions needed to produce particular proteins, which are responsible for an individual's unique characteristics.
Each gene can have many alleles, or variants, that each code for a different version of the desired trait. A cell's chromosomes, which each contain several genes, are home to those genes.
Therefore, nucleotide part of the DNA model is most directly associated with the coding of genetic information.
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5. Describe what would happen to a human body cell in the following situations:
A. Body cell in fresh water
B. Body cell in salt water
Answer:The cell will burst if you put it into salt water and if you put it into fresh water I believe it will becomes hypertonic.
Explanation:
22. The --- structure of the human population is a contributing factor to
population growth in some countries
When attempting to forecast changes in population size, demographers frequently focus on four major factors: birth rates, death rates (life expectancy), the population's starting age profile (whether it is relatively young or old to begin with), and migration.
What factors contribute to population increase in emerging nations?A decline in mortality rates, a youthful population, higher standards of living, and beliefs and behaviours that encourage high reproduction are some of the causes of the fast development.
Population is a crucial component of development since it affects both economic development and growth in both favourable and unfavourable ways.
Population growth is the increase in a population's or a dispersed group's size. Every year, an additional 83 million individuals, or 1.1% of the world's population, are added. The world's population has grown from 1 billion individuals in 1800 to 7.9 billion in 2020.
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CLASSIFICATION OF ORGANISMS
I. Choose the ODD ONE OUT! WHICH DOES NOT BELONG IN THE GROUP? Give a valid and logical reason why based on the concepts of classification of organisms.
NOTE: USE the RESOURCES on CLASSIFICATION in your CONTENT LIBRARY for information.
Bread mold, yeast, algae, mushroom
Answer:
Hibiscus plant, Rose plant, Ginger, Fern
Answer:
Fish, starfish, anemone, conch.
Answer:
Frog, toad, newt, lizard
Answer:
Snake, jellyfish, starfish, sea urchin
Answer:
We can define species as a group of organisms that reproduce among themselves and are capable of producing fertile offspring. Ecology is the niche of Biology that focuses on the study of the relationships of all living beings, whether with each other or with the environment. In 1866, for the first time, the German-born biologist Ernst Heackel used the term in his work General Morphology of the Organism.
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Select the correct answer.
Which statement about anthropology and its comparison to other social sciences is correct?
OA Anthropology relies on written records, while history does not.
OB. Unlike psychology, anthropology studies the general human characteristics and thought processes in individual people.
OC. Anthropology relies on excavation to study ancient societies, much like archaeology does.
OD. Anthropology compares small societies to understand their cultural diversity, while sociology studies larger groups of humans,
such as urban societies.
Anthropology is more holistic in nature and studies the general characteristics and thought process in individuals while psychology is the study of thought process and behavior of an individual.
Anthropology relies more on the thought process of people shaped by their cultural pattern, on the other hand psychology focuses on the universal trend of the human thought process.
Anthropology and history both relies on the written records as well as other sources.
Like archaeology, anthropology also relies on the study of the ancient civilization but it also uses current society and its mindset to study the human behavioral pattern.
Anthropology studies the society from small to a larger perspective.
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Which of the following choices is not a concept related to B cells?
humoral immunity
antibodies
cell-mediated immunity
foreign pathogens
According to the research, the correct option is cell-mediated immunity. Cell-mediated immunity is not a concept related to B cells.
To find the correct option amongst all other options, we need to know more about B cells and which role they fulfill in the body.
What are B cells?The lymphocytes generated in the bone marrow whose main role is to be the only cells in the body capable of providing defense against microorganisms are called B cells.B cells are designed to create, produce and release antibodies that can identify and bind to foreign agents.They are the cellular basis of the humoral immunity, which is attributable to specific antibodies, the contrary of Cell-mediated immunity which is mediated by T lymphocytes.Thus, we can conclude that according to the research, the correct option is cell-mediated immunity. Cell-mediated immunity is not a concept related to B cells.
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experts believe that a good night sleep is vital to a success in school. Would kids that sleep 8 or more hours a night get better than kids who sleep less than 7 hours a night?
Sleep not only improves memory and learning, but it also has the power to prioritize memories by segmenting and arranging them according to emotional significance.
In essence, the more you learn, the more sleep you require, which is why getting a decent night's sleep is essential for doing well in school.
Many students skip sleep in order to earn good scores, yet studies show that those who sleep more often perform better academically.
Children and teenagers may struggle with attention, memory, and problem-solving skills if they don't get enough sleep.
Lack of sleep can also contribute to emotional problems and behavioral disorders that may impair academic performance. Teenagers require more sleep due to the rapid growth of their bodies and minds.
According to scientific studies, a lot of teenagers don't get enough sleep.
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Describe the structural differences between a plant and animal cell.
Answer:
plant cell is rectangular in shape where animal cell is spherical/oval in shape
Is increased brain size a Biological Characteristic?
Answer:
Yes it is
Explanation:
Since we face many problems in the future. The brain gets bigger and as we produce our kids they may have some
I think .-.
According to Newton's 1st law of motion, called the law of inertia, if you kick a soccer ball on a field of grass, it will stop because _____.
only you can make it stop
inertia makes it stop
friction from the grass makes it stop
it won't stop
Friction from the grass makes it stop.
Law of inertia states that every object will remain in its position or rest or in a straight line of uniform motion until it is compelled to change the sate by and outside action.
So here in this case if you kick a soccer ball on a field of grass, it will stop because of the friction on the grass ground. friction is a type of force which is acting here. when we kick the ball there is an inertia acting on the ball and it starts moving as the ball is moving the friction force is acting on the ball when the friction force is greater than the ball it will stop moving.
So the friction from the grass makes the ball to a stop
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Vacuoles usual hangouts. And where can it be found within a cell
Answer:
animal and plant cells
explanation:
cause they are storage bubbles
How can reduced precipitation lead to limited water availability?
It may lead to overuse.
It makes water nonrenewable.
It contaminates current supplies.
It may lead to drought.
The way that reduced precipitation can lead to limited water availability is as follows: It may lead to drought (option D).
What is precipitation?Precipitation is any or all of the forms of water particles, whether liquid or solid, that fall from the upper atmosphere. Examples are rain, snow etc.
Precipitation is one of the major supplies of water to the Earth, hence, a reduction in the amount of precipitation (rainfall) will adversely affect the availability of water by causing drought, which is a period of unusually low rainfall.
Therefore, it can be said that the way that reduced precipitation can lead to limited water availability is as follows: It may lead to drought.
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Answer: D
Explanation: it may lead to drought
How does this behavior increase the organism's chance for survival and reproduction?
Evidence:
Behaviors have both an innate component and a learned component. Behavior is shaped by natural selection. Many behaviors directly increase an organism's fitness.
The idea of herbal choice is that traits that can be passed down permit organisms to conform to the environment higher than other organisms of identical species. This enables better survival and reproduction as compared with different individuals of the species, main to evolution. The character benefits by helping the institution, due to the fact the organization reciprocates by using supporting the character. Such cooperation strategies grow the assets necessary for survival that the organization can accumulate.
Mating conduct and defending Territory. a number of the most critical animal behaviors contain mating. Mating is the pairing of an adult male and girl to supply younger. Adults that are maximum a success at attracting a mate are maximum probably to have offspring. Behaviors associated with duplicates are essential members of the evolutionary achievement of organisms.
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Which of the following are difference(s) between gram-positive bacteria and gram-negative bacteria?
are Gram-positive bacteria are all coccus and spirillus shape; Gram-negative bacteria are all bacillus shaped.???
Answer: gram negative bacteria are rod, bacillus shaped
Explanation:
gram positive are arranged in many shapes like cocci or spirillus.
16. What is the function of the macromolecule subunit below?
a. Energy
b. Catalyst
c. Stores genetic information
d. Composes most of the cell membrane
Answer:
Stores genetic information It's a nucleotide
Explanation:
A nucleotide is the basic building block of nucleic acids (RNA and DNA). A nucleotide consists of a sugar molecule (either ribose in RNA or deoxyribose in DNA) attached to a phosphate group and a nitrogen-containing base.
Read about the reproductive processes of the animals below. Then decide
whether the process is an example of asexual reproduction,
sexual reproduction, or both.
How much biosphere extends to the distance?
Answer:
20 kilo meters(12 miles)
An example of the use of sugar/starches is
the growth activity of the cell is an important role by chromatin it is also responsible for the metabolism of cell as well as the genetic functions of cells
Chromatin plays a important role in metabolism of cell and it regulates the genetic activities of the cell as well. To create chromosomes, chromatin fibers are coiling and condensing. Numerous cellular functions, including DNA replication, transcription, DNA repair, genetic recombination, and cell division, are made possible by chromatin.
The compactification of lengthy DNA strands is chromatin's primary function. The compartment in which DNA is housed in the nucleus is much smaller than the length of the DNA itself. The DNA needs to be compressed in some way in order to fit into this compartment. The degree of DNA condensing is measured by the packing ratio. DNA is not directly packaged into the structure of chromatin in order to obtain the overall packing ratio. Instead, it has numerous organizational structures.The process of transcription involves proteins reading the genetic data encoded in DNA, converting it into RNA, and then translating the RNA into useful proteins. No transcription happens if the chromatin becomes stronger and prevents access to the read proteins. Transcription can be carried out by euchromatin, an expanded kind of chromatin. While heterochromatin, a condensed form of chromatin, is crammed too closely together for proteins to read DNA.All DNA-based processes are hindered by the way DNA is wrapped up in chromatin. Chromatin can easily change its shape and structure because of the very dynamic way that proteins and DNA are arranged. At the site of DNA damage, chromatin relaxes quickly, allowing repair proteins to connect to the damaged DNA and repair it.So, for genome replication, transcriptional silencing, DNA repair, and recombination, chromatin architecture is essential.
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Your question in incomplete, For full question please refer:
The growth activity of the cell is an important role by chromatin it is also responsible for the metabolism of cell as well as the genetic functions of cells. Explain it.
The lungs of an animal, shown here, exchange gases with the environment to allow for oxygen to move in and carbon dioxide to move out. The description of the function of the lungs is most similar to the explanation of what organelle within the eukaryotic cell?
A cell wall
B cytoplasm
C nucleus
D cell membrane