Answer:
The diameter of the model cell would be 80cm.
Explanation:
We know that 1 cm represents 0.5 μm, but we need to know how many centimeters are 40μm. To do so, we apply the simple rule of three:
So if 1cm= 05μm, 40μm would equal to how many centimeters?
1cm X 40μm = 80cm
0.5μm
We can see that the diameter of the model cell would be 80cm.
What form is DNA in during mitosis?
A. protein
B. ribosome
C. chromatin
D. chromosomes
Answer:
Chromosomes form is DNA in during mitosis.
Explanation:
In the context of the cell cycle, mitosis is the part of the division process in which the DNA of the cell's nucleus is split into two equal sets of chromosomes.
During mitosis, DNA is in the form of chromosomes, which is option D, as the chromosomes are condensed and highly coiled structures made up of DNA and associated proteins called histones.
During mitosis, a cell divides into two daughter cells that are genetically identical to the parent cell. Chromosomes are critical to this process because they carry the genetic information necessary for the formation of the new cells, and before mitosis begins, the chromatin (a complex of DNA and proteins) in the nucleus of the cell condenses into visible chromosomes. This condensation process involves the compaction of chromatin into a more compact and organized structure.
Learn more about the chromosome here.
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i don't know how to do this one
Answer:
what don't you know how to do?
What living thing on the plains of Africa is a producer?
A)
the sun
B)
the grass
C)
the cheetah
D)
the worms in the soil
Answer:
B) the grass
Explanation:
Because producers go through processes like chemosynthesis and photosynthesis and grass which is a plant goes through photosynthesis.
Protists represent an important evolutionary step between and A. fungi, plants B. bacteria, animals O C. single celled organisms, multicelled organisms D. plants, animals Peser Selection
Protists represent an important evolutionary step between single-celled organisms and multi-celled organisms.
Protists have similar DNA to the DNA of cyanobacteria. This similarity show the evolutionary relationship between cyanobacteria and algae in which cyanobacteria is a single celled organism whereas algae is multi-celled organism so from this discussion we can conclude that protists is an important evolutionary step between single celled organism and multi-celled organism.
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Which of the following would change the allele frequencies of a
population?
A. DNA is stable from generation to generation and does not change, so allele
frequencies do not change.
B. Tall people in a population preferentially reproduce with other tall people and
do not reproduce with people who are short or average height.
C. A population on an island remains isolated and no one leaves or moves onto the island.
D. All of the answer choices would change allele frequencies of a population.
The Darwinian theory of organic evolution through natural selection affected American religion by a raising awareness of the close spiritual kinship between animals and human beings. b turning most scientists against religion. c causing a revival of the doctrine of original sin. d sparking the rise of new denominations based on modern science. e creating a split between religious conservatives who denied evolution and accomodationists who supported it
Answer:
.e creating a split between religious conservatives who denied evolution and accomodationists who supported it
Explanation:
The Darwinian theory of organic evolution proposed that all forms of life evolved from more primitive life by differential survival and reproduction (i.e., by natural selection). Moreover, creationism is the religious belief that humans were created by God, whereas accommodationists refer to the persons that endorse cooperation and concession to the viewpoint of the opposition. In this case, Darwinian theory challenged the traditional religious anthropocentric viewpoint on human origins (i.e., humans descended from ape-like creatures by natural selection).
Exercise Multiple Choice Question 1. A cell has mitochondria, centrosome with centrioles, nucleus and other cell organelles. Based on this information, this cell could be a cell of A. an apple B. a yeast. C a cat. D a flower.
Answer:
Cat
it contain centrioles which is present in animal cell
There are 20 different amino acids
Answer: Hi, there your answer is:
Valine, Leucine & Isoleucine
Alanine
Arginine
Glutamine
Lysine
Aspartic acid
Glutamic Acid
Proline
Cysteine
Threonine
Methionine
Histidine
Phenylalanine
Tyrosine
Tryptophan
Asparagine
Glycine
Serine
Explanation:
can natural selection happen in the hardy-weinberg equilibrum
Answer:
yes
Explanation:
The Hardy-Weinberg equilibrium can be disturbed by a number of forces, including mutations, natural selection, nonrandom mating, genetic drift, and gene flow. ... Because all of these disruptive forces commonly occur in nature, the Hardy-Weinberg equilibrium rarely applies in reality.
Ype the correct answer in the box. Spell all words correctly. What is the process of using natural resources efficiently to ensure their availability for future generations known as? is the process of using natural resources efficiently to ensure their availability for future generations.
Answer:
The correct answer is - Sustainable development.
Explanation:
Sustainable development is the process of using or utilizing the natural resources in the present in such an efficient way that there will be resources for future generations without compromising their needs.
It is essential in the current situation as people overexploiting the natural resources that it is quite possible there will very few resources will be left for future generations.
What are at least two characteristics of RNA?
O Single stranded
O Present at nucleus and cytoplasm
O uracil instead of thymine
O All of the above
.
Answer:
Present at nucleus and cytoplasm
Answer:
Characteristic feature of RNA are as follow:
Ribonucleic acid“ RNA” is another nucleic acid type. Like deoxyribonucleic acid “DNA ” it is polynucleotide but several differences are found in their structure.
In RNA the pentose sugar is ribose not deoxyribose.
RNA contain uracil in place of thymine.
RNA ,generally single stranded with partially double stranded region due to the folding at back of its single chain.
RNA sevres as genetic material in many viruses.Thrre are three major classes of cellular RNA s which function during gene expression.
These are:
Messenger RNA (mRNA)
Transfer RNA (t RNA)
Ribosomal RNA (rRNA).
If you forget your water bottle when you go for a long walk on a warm day,
what signal would most likely be sent to your kidneys?
Answer:
C
Explanation:
On detecting less amount of water in blood the hypothalamus gives signals for releasing the anti-diuretic hormone which causes kidneys to remove lesser amount of water from the blood.
And your Answer is Best management practices (BMPs) are methods that have been determined to be the most effective and practical means of preventing or reducing non-point source pollution to help achieve water quality goals. BMPS includes both measures to prevent pollution and measures to mitigate the pollution.
Answer:
Use Fertilizers Wisely.
Apply Pesticides Wisely.
Use Landscaping Practices that Prevent Erosion.
Wash Your Vehicle Wisely.
Dispose of Pet Waste.
Use and Dispose of Household Chemicals Safely.
Evaluate Existing Roads
10. Describe what happens in the system shown below. (3 marks)
HELPP WILL MARK BRAINLIEST
Answer:
this is a circulatory system
in this system the purification of blood is occurs between the lungs and heart
Explanation:
please make me brainlist answer
Curly hair is dominant over straight hair. Use H and h
Male is HH
Female is hh
Answer:
I think that is how you do it.
Thousands of years ago, the jaws and teeth of jaguars were more varied in size than they are today. During a period of climate change about 11,000 years ago, jaguars faced a
shortage of food. There were fewer mammals to eat, so the jaguars had to eat shelled reptiles. The jaguars with the largest jaws and teeth could most easily eat the shelled reptiles.
Which of the following statements best explains why large jaws and teeth are common characteristics in jaguars today?
O A. Jaguars with the smallest jaws and teeth died out completely.
B. Jaguars with the smallest jaws and teeth were not ever able to mate.
O C. Jaguars with the largest jaws and teeth survived and reproduced more successfully than other jaguars.
D. Jaguars with the largest jaws and teeth strengthened them by using them more frequently than other jaguars.
Larger jaws and teeth helped certain jaguars survive and procreate more successfully than others. It is an example of natural selection. Therefore, option C is correct.
What is natural selection?Natural selection is the process through which populations of living things adapt and change. According to this, nature chooses the creatures that can adapt to changing environmental conditions and reproduce while eradicating those that cannot.
Natural selection, according to Darwin, is a lengthy, complex process involving several interconnected factors. Natural selection requires variation among the organisms in a population. For the process to work, it must be heritable and passed in some way to the organism's offspring.
Thus, Jaguars with the largest jaws and teeth survived and reproduced more successfully than other jaguars. It is an example of natural selection. Therefore, option C is correct.
Learn more about natural selection, here:
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Give any 2 significance of nitrogen cycle to green plant
Nitrogen is the most abundant element in our planet’s atmosphere. Approximately 78% of the atmosphere is made up of nitrogen gas (N2).
Plant uptake of nitrogen compounds
Once nitrogen is converted into compounds like ammonium and nitrate, these can be taken up from soils by plants and then the nitrogen can be used to form macromolecules like proteins and nucleic acids.
Nitrogen is a crucially important component for all life. It is an important part of many cells and processes such as amino acids, proteins and even our DNA. It is also needed to make chlorophyll in plants, which is used in photosynthesis to make their food.
As part of these life processes, nitrogen is transformed from one chemical form to another. The transformations that nitrogen undergoes as it moves between the atmosphere, the land and living things make up the nitrogen cycle.
Fixation
Nitrogen in its gaseous form (N2) can’t be used by most living things. It has to be converted or ‘fixed’ to a more usable form through a process called fixation. There are three ways nitrogen can be fixed to be useful for living things:
give two examples of what a living thing can do once it has converted the energy from food into usable forms of energy.
Answer:
When the chemical energy in food is transferred to cells in the body, the energy can be transformed into energy used by the body to do many things like run, ride a bike, do the dishes, pump the heart, and keep the body warm.
Two examples of what a living thing can do once it has converted the energy from food into usable forms of energy are growth, reproduction, and movement, and by using the energy, they survive in the ecosystem.
What is the significance of the energy from food?Energy from food can be obtained, and that energy is further used for many reasons, such as metabolism and movement, and a living organism can use it to power its muscles for movement such as running and swimming. Apart from that, the energy is used for growth and reproduction, which allow an organism to develop and produce offspring.
Hence, two examples of what a living thing can do once it has converted the energy from food into usable forms of energy are growth, reproduction, and movement, and by using the energy, they survive in the ecosystem.
Learn more about the energy in food here.
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a large glucose molecule requires facilitated diffusion, but an oxygen molecule does not
Answer:
A large glucose molecule requires facilitated diffusion but an oxygen molecule does not is a semipermeable membrane
Explanation:
Have a nice day :)
Viruses are considered living cells?
A. True
B. False
What's a good cereal name for Platinum? for an example like Platinum Crunch
Answer:
Platinum Pebbles
Explanation:
Like this Hair Follicle Cell, EVERY cell in your body, contains:
A. half a set of DNA
B. a whole set of DNA
GUYS PLS HELP ASAP!!!
Answer:
B: A whole set
Explanation:
The only cells in your body that don't are sex cells. ie. Eggs and Sperm
The part of the lymphatic system that filters the blood is which of the following?
A. Lymph nodes
B. lymph
C. Lymphatic Vessels
HIV binds to Helper T cells of your immune system.
A. True
B. False
Answer: True
HIV infects a type of white blood cell in the body's immune system called a T-helper cell (also called a CD4 cell). These vital cells keep us healthy by fighting off infections and diseases. HIV cannot reproduce on its own. Instead, the virus attaches itself to a T-helper cell and fuses with it (joins together).
Explanation:
T-cells, the thymus cells, work in a similar way but destroy infected cells rather than manufacture antibodies. In HIV infection, the body mounts a very strong antibody response in the first few weeks that partially works, bringing the viral load down from millions to, on average, about 50,000 copies/ml.
Answer:
The answer is true...
Explanation:
HIV infects a type of white blood cell in the body’s immune system called a T-helper cell (also called a CD4 cell). These vital cells keep us healthy by fighting off infections and diseases.
HIV cannot reproduce on its own. Instead, the virus attaches itself to a T-helper cell and fuses with it (joins together). It then takes control of the cell’s DNA, makes copies of itself inside the cell, and finally releases more HIV into the blood. HIV will continue to multiply and spread throughout the body – a process called the HIV lifecycle.
In this way, HIV weakens the body’s natural defences and over time severely damages the immune system. How quickly the virus develops depends on a person’s general health, how quickly they are diagnosed and start antiretroviral treatment, and how consistently they take their treatment
Which set of jobs would be found in
the field of disease evolution?
A. genetic engineering, microbiologist, and
biomanufacturering
B. infectious disease specialist and virologist
C. zoologist, marine biologist, and animal biologist
D. biochemist and epidemiologist
2. The long-term survival of any species of organism is possible only if the organisms can -
A migrate when temperatures change C find protection from predators
B reproduce successfully
D locate a constant food source
(If you want to give me the rest of the answers I will like that also)
Answer:
may be the answer is B. reproduce successfully
How are species richness and productivity related?
Answer:
Recent studies have examined the possibility that variation in species richness within communities may influence productivity leading to an exploration of the relative effect of alterations in species number per se as contrasted to the addition of productive species.
Explanation:
hope this helps
have a great day/night
1. What is the complementary RNA sequence of ATA, GCG?
O UAU;CGC
O TAT:CGG
ATA: GCG
None of the above
Answer:
UAU;CGC
THIS IS THE CORRECT ANSWER
A conservation biologist joins a political party and campaigns within the party to help other members understand issues relating to climate change and biodiversity. She also belongs to several environmental organizations, which she supports by giving public talks and lobbying members of Congress on environmental issues. This person could best be described as a(n)
Answer:
This person can be described as an environmentalist.
Explanation:
An environmentalist is a person who has adopted environmentalism as a philosophy that makes this person work and manages to direct their activities towards the preservation of the environment and sustainable development. These people seek to teach others to preserve the environment and seek to defend it through politics, economics and any other social factor that can help to achieve this goal.
The person presented in the question above is an environmentalist, because, as we can see, this person is available to give a lecture on environmental preservation, interacts with environmental activist groups and seeks political support to address issues on climate issues, sustainability and biodiversity .
An example of a carnivore. Define the term carnivore, and identify another term that can represent this organism’s place in a food chain.
Answer:
Example:Dogs,Lions
Explanation:
A carnivore is an animal which fedd on meat.
Answer:
tigers, bears, and panthers
Explanation:
A carnivore is a consumer that consumes other animals. that means it is near, or at the top of the food chain. (pls give brainliest!)