240.5 gram DNA is in an adult human’s body.
Explanation:
DNA is the genetic material in human body. It is given that each human cell has approximately 6.5 picograms of DNA. It is also given that there are 37 trillion cells in the body.
We have to calculate the amount of DNA in human body.
Number of cells=37 trillion = [tex]3.7 \times 10^1^3[/tex]
Amount of DNA per cell= 6.5 picogram = [tex]6.5 \times 10^-^1^2g[/tex]
Total amount of DNA in body= [tex]3.7 \times 10^1^3 \times 6.5 \times 10^-^1^2[/tex]
=240.5 g
Final answer:
To find the total amount of DNA in an adult human body, multiply 37 trillion cells by 6.5 picograms per cell and convert to grams. The result is approximately 240.5 grams of DNA.
Explanation:
To calculate the total amount of DNA in an adult human body, we will multiply the number of cells by the amount of DNA per cell. According to the question, an adult has approximately 37 trillion cells, and each cell has roughly 6.5 picograms of DNA. To find the total DNA in grams, we proceed as follows:
Total DNA (in grams) = number of cells ×amount of DNA per cell
Total DNA (in grams) = 37 trillion cells × 6.5 picograms/cell
We then convert the number of cells to a numerical value and picograms to grams:
Total DNA (in grams) = (3.7 × 10¹³ cells) × (6.5 ×10⁻¹² grams/cell)
Now, we multiply these two values:
Total DNA (in grams) = 3.7× 6.5 ×10¹³ × 10⁻¹²
Total DNA (in grams) = 24.05 10¹
Total DNA (in grams) = 240.5 grams
Therefore, the correct answer is that an adult human body contains approximately 240.5 grams of DNA.
Suppose a global disaster causes a genetic mutation that causes all animals to stop respiring. How would plants be affected by this mutation?
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Question 24 of 25
2 Points
Which human activity has the most negative effect on the stability of a river
environment?
O
A. Driving a car near the river
O
B. Boats leaking oil into the river
O
c. Sailboats being stored in the river
O
D. People picnicking along the bank of the river
_____ all the biotic and abiotic factors in a
particular area
Answer:
An ecosystem is made of all biotic and abiotic components in a particular area.
Explanation:
In any ecosystem two components perform together. These are biotic component and abiotic component.
Abiotic component- These are the non living component of ecosystem. All the environmental conditions minerals are the part of abiotic component.
TemperaturepHsunlightwater contentsoilAir MineralsAll are abiotic component of an ecosystem.
Biotic component- All living organisms, plant etc. are biotic component of ecosystem. These can be understand by following points.
Producers- Producers/autotrophs are the first member of any food chain. They make their own food using sunlight. They perform photosynthesis and convert light energy into chemical energy in the presence of sunlight. Example, green plants and photosynthetic blue green bacteria and algae.Consumers- Consumers are the second member in food chain. For their nutrition they depend on producers. They are - primary, secondary and tertiary consumers.Decomposers- Decomposers are organisms decompose dead and decaying matter and obtain energy from it.What is the role of cyclin-dependent kinases in the cell cycle?
Question 5 options:
They stop the cycle if something has gone wrong.
They catalyze the condensation of the chromosomes.
They provide the energy for the actions of the spindle fibers.
They initiate various stages of the cell cycle.
Answer:
The role of cyclin-dependent kinases in the cell cycle is "They initiate various stages of the cell cycle ".
Explanation:
Cyclin dependent kinase belong to the family of protein kinase that have been first discovered due to their role of regulating the cell cycle. They also helps in the transcription, mRNA processing and also in the differentiation of the nerve cells. A single cyclin belongs from a class of cell cycle helps in the molecule control, and when more one cyclin are there they form a group together which further helps in the progression of the cell by the help of check points.
Drag the tiles to the correct boxes to complete the pairs.
Match the phases in the cell cycle to the events that occur in each phase.
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The nucleus divides = mitosis
The cytoplasm divides = cytokinesis
The DNA replicates = interphase
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The nucleus divides = mitosis, The cytoplasm divides = cytokinesis and The DNA replicates = interphase.
What is Cell cycle?A cell's growth and division are accompanied by a sequence of processes known as a cell cycle. A cell spends the majority of its time in what is known as interphase, where it develops, duplicates its chromosomes, and gets ready to divide.
The cell then exits interphase, goes through mitosis, and finishes dividing. Each of the resultant cells, referred to as daughter cells, enters its own interphase to start a fresh cycle of the cell.
We refer to the procedure through which cells multiply and divide into two new cells as the cell cycle. G1, S, G2, and M are the phases of the cell cycle, respectively.
Therefore, The nucleus divides = mitosis, The cytoplasm divides = cytokinesis and The DNA replicates = interphase.
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As you add drops of water to the surface of the penny, each drop sticks to the other
water droplet forming a large drop on top of the penny. This is caused by which
water property?
adhesion
cohesion
O capillary action
Answer:
Cohesion property.
Explanation: Cohesion refers to the attraction of molecules for other molecules of the same kind, and water molecules have strong cohesive forces thanks to their ability to form hydrogen bonds with one another.
Answer:
As you add drops of water to the surface of the penny, each drop sticks to the other water droplet forming a large drop on top of the penny. This is caused by (B) Cohesion.
Explanation:
The pure substance molecule attracts each other. Their sticking process to each other is called cohesion. Their depending property shows whether the substance is cohesive or not. Hydrogen bond easily attracts each other because of this property and due to this, water is very cohesive. In liquid form of water, they easily break and reform it. The cohesive property of water is what we can see in our daily life. We can see it in forms of droplets and streams.
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Which statement accurately describes the geologic features?
The diagram shows cross-cutting relationships among rocks.
A. D occurred after B.
B. D occurred before A.
C. A formed after the horizontal layer above was deposited.
D. F formed before the horizontal layer above was deposited.
Answer:
D. F formed before the horizontal layer above was deposited.
Explanation:
The diagram represents a cross cutting relationship is a principle of the geology and states that the geologic features that cuts the other features are a younger type of feature and is given by the nicholas steno. F is a fault that cuts through the A, B, C and E.Name the stages of alternation of generations. Specify whether the stage is diploid or haploid
Answer:
The alteration of generation is also called metagenesis. Haploid and diploid both stages are multicellular. Here both may be dominant to various types of degree but in different species. Meiosis and fertilization separate the organism's development into two. The two stages are different genetically. This cycle happens in plant and some different types of algae. About all animal have diploid-dominant cycle in which gametes are only haploid. Most fungi and some protists have haploid dominant cycle. In this cycle, the body of the organism become mature.
E
DNA is composed of repeating structural units
called
T .
is the five-carbon sugar found in
DNA.
Answer:
DNA is composed of repeating structural units called nucleotides.
Deoxyribose is the five-carbon sugar found in DNA.
Explanation:
Each DNA (deoxyribo nucleic acid) molecule has two strands and they are made up of monomers called nucleotides. The nucleotide in DNA contains a phosphate group attached to a five-carbon deoxyribose sugar molecule and one of the four nitrogenous bases: adenine, guanine, cytosine and thymine. DNA has a phosphate-sugar backbone from which the nitrogenous bases project. This backbone is made by the nucleotides that are combined together by covalent bonds between the sugar of one nucleotide and the phosphate of the next. The two strands are held together by hydrogen bonds between the base pairs (adenine bonds only with thymine and cytosine with guanine) to form a double helix structure.
Answer:
1. nucleotides
2. Deoxyribose
Explanation: :)
A stream table is a tool used to show how water causes erosion. Water from the left side of the table is added to model a stream. Suppose a block of wood is placed under the left edge of the table. Which characteristic of the stream is changed? gradient of the stream sediment in the stream velocity of the stream volume of the stream
Answer:
gradient of the stream
A stream table is a tool used to show how water causes erosion. Water from the left side of the table is added to model a stream is gradient of the stream.
What is the use of gradient?The gradient of any line or curve tells us the rate of change of one variable with respect to another.
Thus, gradient of the stream is the correct answer.
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A massive toxic spill kills off half the population of photosynthetic plankton in the ocean. What do you predict may happen to the atmosphere as a result of this event?
Answer:
The amount of oxygen in the atmosphere would decrease.
Explanation:
This is because phytoplankton have chlorophyll to capture sunlight, and they use photosynthesis to turn it into chemical energy. They consume carbon dioxide, and release oxygen. All phytoplankton photosynthesize, but some get additional energy by consuming other organisms.
Which characteristics are used to describe air? Select three options.
altitude
density
mass
pressure
radiation
Answer:
Density, Pressure and Mass are used to describe air.
Answer:
Density, Pressure and Mass.
Explanation:
Air is a fundamental element, being formed by a combination of gases, water vapor and suspended particles, it can be described using the terms density, pressure and mass. It is therefore a vital substance for the maintenance of life on earth, alongside water and soil.
In addition, air is essential for climate, rain distribution and seed dispersion which favor agricultural production. On the other hand, it favors the development of various diseases by viruses, bacteria and microorganisms, which are carried by drafts.
The main elements that make up air are essentially nitrogen (78%) and oxygen (21%) and in small amounts argon (0.94%), carbon dioxide (0.03%), neon (0.0015%). Although it has weight and takes up space in the atmosphere, note that air is a collection of substances that has no color, smell, taste and that we cannot see or touch.
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Students wonder if the size of the moth population affects the growth of the trees in the ecosystem? Which of the following is the best way to test this?
-study other ecosystems
-collect tree growth data
-collect moth data
-collect data on tree height and moth population size
Answer:
-collect data on tree height and moth population size
Explanation:
The answer should be D I believe. While you can study other ecosystems, you are testing this one, and you are finding correlation between the amounts of moths and the growth/heights of the trees, so the answer should be this.
In the Watson-Crick model of a double helix, the "steps" of the "spiral staircase" are composed of:
A- sugars
B- nitrogen bases
C- phosphates
Answer:
Explanation:
DNA’s famous double helix is often depicted as a spiral staircase, with two long strands twisted around each other and steps composed of four chemical building blocks called bases. Each of these bases contain rings of carbon, along with various configurations of nitrogen, oxygen, and hydrogen. The arrangement of these atoms allow G to pair with C and A to pair with T, like interlocking gears in an elegant machine.
Answer:
The answer is C
Explanation:
why mammal embroys and dinosaur embroys have placodes
They came to the conclusion that birds, mammals, and reptiles all inherited placodes from the very same antiquity reptilian ancestor.
What is an ancestor?An ancestor is a parent or (recursively) the parent of an antecedent, also known as a forefather, fore-elder, or forebear.
An ancestor is anyone from whom one descends. In law, the person who has inherited an estate.
According to a new study, the ancestor of all placental mammals, the diverse lineage that includes almost all species of mammals living today, including humans, was a tiny, furry-tailed creature that evolved shortly after the dinosaurs died.
Modern humans evolved from their most likely common ancestor, Homo erectus, which means "upright man," in Africa within the last 200,000 years.
Birds, mammals, and reptiles all inherited placodes from the same ancient reptilian ancestor, according to both mammals and dianosaurs.
Thus, mammal embryos and dinosaur embryos have placodes.
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Provide a detailed explanation of the water cycle and how plants are involved with this process.
Answer:
transpiration
Explanation:
Plants absorb water on their stems and leaves and that water leaves when they release oxygen in the process of photosynthesis. The water is evaporated then begins to form into a cloud following the rest of the water cycle and the process starts again.
Genetic disorders can result in chroma tides fail to separate properly during which phase is this problem most likely to our car
Answer:
Anaphase of meiosis II
Explanation:
I think you are asking during which phase of cell division sister chromatids are mostly likely to fail to separate properly, a phenomenon that can lead to genetic disease.
This is sometimes called non-disjunction, and it is most likely to occur in anaphase during meiosis II. During this stage, sister chromatids of the two daughter cells produced by meiosis 1 are separated and brought to opposite parts of the cell. If something goes wrong at this stage, the sister chromatids can fail to separate properly, meaning the daughter cells do not have the correct number of chromosomes (see attachment).
An example of such a genetic disorder is Down syndrome
Which of the following is NOT an aquatic biome?
Answer:
Grassland
Explanation:
"Aquatic" means "relating to water"
Grasslands do receive rainfall, but not enough for it to be an aquatic biome.
From the given options, the one which is not an aquatic biome is: (2) grassland.
Grasslands are terrestrial biomes characterized by vast areas of grasses and few trees, with varying levels of rainfall and seasonal changes. These ecosystems are found on every continent except Antarctica and can vary in climate, vegetation, and animal life depending on their location.
An aquatic biome, also known as an aquatic ecosystem, refers to any environment that is predominantly water-based, encompassing both freshwater and marine habitats. These biomes can range from small bodies of water like ponds to vast oceans and include various types of aquatic ecosystems, such as lakes, rivers, estuaries, coral reefs, and the open ocean.
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The given question is incomplete, the complete question is:
Which of the following is NOT an aquatic biome?
freshwatergrasslandmarinenone of the aboveWhich of the following is the term for
the substances which are involved in
order to make the formula of
photosynthesis work?
A. products
B. organelles
C. reactants
D. synthesis
The correct answer to the question is C. reactants.The substances involved in making the formula of photosynthesis work are called reactants. The main reactants for photosynthesis are water and carbon dioxide. Thus, the correct term in the context of the question is reactants.
The substances involved in making the formula of photosynthesis work are called reactants.
During photosynthesis, the main reactants are water (H2O) and carbon dioxide (CO2), which, in the presence of light energy, produce glucose (C6H12O6) and oxygen (O2) as products. The chemical equation for photosynthesis can be summarized as:
6 CO2 + 6 H2O + light energy → C6H12O6 + 6 O2.
Therefore, the correct answer to the question is C. reactants.
What part of the human body has the same role as the power source in a computer?
Answer:
Heart
Explanation:
WIthout Heart, you will die. But you can breathe volunatrily without a brain.
Answer:
The heart
Explanation:
sponse Question #1
Rosa eats a peanut bu
of protein, and bread is mo
afternoon. Rosa is breathing
nut butter sandwich for lunch. Peanut butter contains a lot
read is mostly starch. Rosa plans to go for a run later this
Rosa is breathing normally.
ne need from the food she ate and the air she breathes so that
her run? How do Rosa's body systems work together to get the
the needs into her cells? How do her cells use these molecules to
release energy for her body to run
What does she need from
she can go on her run? Howa
molecules she needs into her
Answer:
Sugar and other starch molecules get stored in the body in the form of glycogen. Glucose is the main energy source that is required by the body during exercise. Complex molecules, like starch and glycogen, need to be converted into glucose during exercise. So, having a carbohydrate-rich diet before exercise is necessary.
The glucose is then used for cellular respiration to generate ATP molecules. About, 36-38 molecules of ATP are generated by aerobic respiration.
A rabbit eats a carrot. What happens to the matter in the carrot?
A.
The matter is completely consumed by the rabbit.
B.
The matter is completely eliminated by the rabbit as waste.
C.
The matter is converted to energy and carbon molecules.
D.
The matter is converted to energy only.
Answer:
Answer to this question is option C i.e. The matter is converted to energy and carbon molecules.
Explanation:
All the living beings from plants to animals are made up of carbon, and so is carrot, being a part of a plant. When an animal, say rabbit, consume this carrot, they receive the carbon from the carrot in the form of carbohydrates and proteins. This carbon combines with the oxygen in the animal cell to produce energy and also releases residual carbon in the form of carbon dioxide. Hence, after consumption of carrot by the rabbit, the matter in the carrot is converted to energy and carbon molecules.
Answer:
carbon molecules
Explanation:
Which is a disaccharide?
glucose
fructose
sucrose
cellulose
Answer:
Its C: Sucrose
Explanation:
A disaccharide is a polymer made of two monomer units linked and bonded together. A sucrose molecule is an example of a disaccharide carbohydrate. Thus, option C is correct.
What are disaccharides?Disaccharides are the carbohydrates that constitute of two sugar or monomeric units linked by a glycosidic linkage. They are simple sugars that can get dissolved in water.
Sucrose is a simple and most abundant sugar that comprises one glucose and one fructose molecule. The monomeric units are linked by ether bonds between the reducing ends of both sugars.
Glucose and fructose are monosaccharides that comprise only one sugar molecule, whereas cellulose is a polysaccharide that is insoluble sugar with various monomeric units.
Therefore, option C. sucrose is a disaccharide.
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The statements “Evolution through natural selection accounts for the huge diversity of life on Earth” is an example of a: Select one: A. Theory B. Hypothesis C. Law D.Fact
Answer:
A. theory
there is no way of knowing for sure wether this is true but there is evidence
Oil is a fossil fuel that provides power to sustain a modern lifestyle. Which of these statements best describes a benefit of oil drilling.
No air pollution is detective from Oil drill machinery
Less expensive source of energy is available
Radiation may cause health problems
Water and soil may be contaminated
Less expensive source of energy is available.
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Answer:
Less expensive source of energy is available
Explanation:
Oil is considered, alongside water, the main natural resource of the modern era. Although there are government efforts around the world to reduce dependence on this element, it is still the most widely used fuel. In addition to the fact that it is a non-renewable resource, oil has the disadvantage of emitting large quantities of pollutants into the atmosphere during its burning.
However, oil has several advantages, the first being that it represents a more efficient and cheaper form of energy. In addition, its reservoirs are generally easy to locate, extract and process.
Lipids and proteins are both types of what? A. Carbohydrates
B. Elements
C. Macromolecules
D. Atoms
Answer:
C.
Explanation:
Lipids and proteins are both types of macromolecules. Macromolecules are molecules made up of more than one atom.
Answer:
The correct answer is C.
C. Macromolecules
Explanation:
Why are pesticides used?
Answer:
Pesticides are used to kill insects,for proper cultivation etc
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A cell that is undergoing mitosis is examined with a light microscope. An observation that would allow for identification of the cell as an animal cell rather than a plant cell would be
Question 10 options:
the centrioles migrating.
the chromosome pairs separating from each other.
the chromosomes twisting about each other.
the nucleoli disappearing.
An observation that would allow for identification of the cell as an animal cell rather than a plant cell would be the nucleoli disappearing.
Explanation:
Mitosis is first phase where parent cell is divided into two identical daughter cells. It is the primary organism where organism generates new cells through cell division. It is a duplication of its parent cell. Here parent cell passes genetic material to its daughter cell. It is the first stage of cell division.
The main purpose is replacing a worn out new cell. In mitosis, chromosome becomes highly compact. It can be seen through microscope in both plant and animal cell
The major distinguishing factor when viewing a cell under a microscope that is undergoing mitosis would be the presence of migrating centrioles, which are only found in animal cells. Centrioles play a crucial role in the organization of mitotic spindle fibers, necessary for chromosome separation. Plant cells don't have centrioles but utilize a different mechanism for spindle fiber formation during mitosis.
Explanation:In this scenario, the major distinguishing factor would be the centrioles migrating. Centrioles are a structure you would only find in animal cells. They play a key role in cell division, or mitosis, by migrating to opposite ends of the cell non to form the poles of the mitotic spindle, which is essential for separating the chromosomes between the two daughter cells. However, plant cells do no possess centrioles. They instead use a different process to organize their spindle fibers to form during mitosis. Other aspects, including the separating of chromosome pairs, the twisting of chromosomes, or the disappearance of nucleoli, could be observed in both kinds of cells during mitosis.
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55 Which of the following is an advantage of
sexual reproduction?
A It requires only one parent.
B It can remove harmful traits from a
population.
C It involves cells formed through mitosis.
D It increases the mutation rate.
Answer:
"It increases the mutation rate" is an advantage of sexual reproduction
Explanation:
The basic thing of evolution is fundamental, as it helps in generation of genetic variation on which the selection can act. Sexual reproduction leads to genetic diversity, and this genetic diversity leads to increase the mutation rate. Genetic diversity occurs because of two various cells which are combining together and biological assortment which happens at the time of cell division. Neutral genetic diversity in the population leads to high mutation rate.
33. Cooling food requires proper temperature control. What is the best way to measure if the food is staying
cold enough?
A. Lift the containers to see if the ice is melted
OB. Use a thermometer to check the temperature of the ice water
OC. Use a thermometer to check the temperature of the food
OD. Put lids on the food containers
The best way to measure if the food is staying cold enough is to use a thermometer to check the temperature of the food
Explanation:
Those foods are called Potentially hazardous where bacteria will be held at temperatures in the danger zone, or room temperature. It is 41-degree Fahrenheit and 135-degree Fahrenheit. It means 135-degree Fahrenheit or hotter is the exact temperature for hot holding potentially hazardous food. For cold holding potentially hazardous food is 41°F or colder.
With heating and cooling we keep food move out through the danger very soon. Each and every food needs different temperature for heating and cooling. So, we should use thermometer.