Answer:
1. Thymine, Guanine
2. 36% Adenine
Explanation:
1. Edwin Chargaff, who proposed the complementary base pairing rule, stated in his rule that the amount of purine bases (Adenine and Guanine) is equal to the amount of Pyrimidine bases (Cytosine and Thymine). This means that, in a DNA molecule, the amount of adenine is always equal to Thymine (A=T) and the amount of Cytosine is equal to Guanine (G=C).
Also, the total amount of the four nucleotide bases that make up a DNA molecule is equal to 1 or 100% i.e. A+T+G+C= 100%
2. Based on the rule above, if a sample of jelly fish DNA contains 14% Cytosine, the amount of its complementary pair (Guanine) will also be 14%.
Hence, Cytosine and Guanine will collectively occupy 14+14=28% of the DNA.
To find the amount of the other two bases i.e. Adenine and Thymine, we subtract 28% from 100%
That is, 100 - 28 = 72%
If both Adenine and Thymine contains 72% and each must be equal, we divide 72% by 2 to get the amount of each.
Hence, 72/2 = 36% of Adenine and 36% of Thymine.
According to the question, Adenine will contain 36% in the Jellyfish DNA.
In an ecosystem a population can be defimed as
Answer: In an ecosystem, a population is a group of animals that live in the same area and are the same species. For example, a herd of zebras would be a population, but a horse would not be considered apart of the population because it is a different species than the zebra. (a species are animals that can mate and produce offspring that can also mate).
what is the best example of a community
A good community is a cohesive, safe, confident, prosperous and happy place. It is free of poverty and crime, providing a high quality of life for everyone that lives there. It values and promotes open, participative development processes underpinned by a continuous culture of trans-generational learning.
Ends at a stop codon
A. Transcription
B. Translation
C. Replication
Answer: The answer is B, translation
Which of the following is NOT true about adaptation? A. Adaptation helps organisms survive in their environment. B. Adaptation can be a physical change in the organism.
C. Adaptation will always be the same regardless of the environment.
D. Adaptation can lead to evolution over many generations.
Answer:
c
Explanation:
Adaptation is a heritable behavioral, morphological, or physiological trait that has emerged through natural selection to preserve or improve an organism's fitness. Therefore, option (C) is correct.
What is adaptation?The term "adaptation" refers to a behavioral, morphological, or physiological trait that is inherited and has developed as a result of natural selection to maintain or improve an organism's fitness in response to a specific set of environmental conditions. Adaptation can be thought of as a heritable trait.
One useful illustration is the capacity to conceal oneself. Camouflage is an adaptation that helps an organism blend in with its surroundings so that it is not obvious to other organisms in those same circumstances. The organism is also able to protect itself from the hostile environment thanks to its adaptations.
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What happens if a cell in our body dies (replacement and repair)?
Answer:
If a cell in our body dies ( replacement and repair ) then it can cause individual cell death and if sufficient cells are lost, the result can be tissue or organ failure, ultimately leading to death of the organism.
Explanation:
Answer:
Cell Damage and Tissue Repair. Toxic damage to cells can cause individual cell death and if sufficient cells are lost, the result can be tissue or organ failure, ultimately leading to death of the organism. ... Physical agents such as heat and radiation may damage a cell by coagulating their contents (similar to cooking).
Explanation:
How can changes in trophic levels affect an ecosystem’s health and stability?
Answer:
Trophic levels are part of an energy cascade that allows for energy consumption, conservation, and retention.
Explanation:
By altering trophic levels in an ecosystem, there is shift between the readily energy available within one specfic trophic system. If you remove wolves, for instance, normal prey could increase en-masse. In this way, the removal of wolves allows for an energy expansion that increases and accelerates the growth of that prey species. In their growth, they attain their energy from elsewhere, say specific plants off which they eat.
A gene mutation is a change in the sequence of nucleotides that occurs during cell replication (mitosis and meiosis) within a single coding section of DNA. Mistakes can also occur in the transcription of mRNA or the translation of a polypeptide. However, these changes are not considered to be mutations, because they are not permanent changes to the cell. Explain why "mistakes" in transcription or translation are not as serious as mutations in a gene.
Answer:
The cell has an elaborate mechanism in place that check for and correct the mistakes that happen during replication, transcription or translation. This process is called as proofreading. The incorrect nucleotide added during replication cause the replication to be halted for a while. The DNA polymerase enzyme fixes the error and replication then resumes as normal.
Gene mutation, on the other hand, is a permanent change in the DNA sequence that might lead to cancer.
Hope that answers the question, have a great day!
The presence of branchial clefts in a human embryo suggests
Leah, LaRenda, and Gabi decide to test what factors influence water
absorption by an egg. They remove the shell from 3 eggs by dissolving
them in vinegar. They create three different water solutions. One is pure,
100% distilled water, a second is 50% water/50% corn syrup, and the third
is 100% corn syrup. The mass of each egg is measured before they are put
into a single solution for 24 hours. The mass of the eggs is then measured,
and the data recorded below: Based on the data this group gathered, the
most appropriate hypothesis would be
Answer:
how long well that take
In this experiment, the independent variable they are testing is the type of solution in which the egg is placed.
What is the independent variable?In the data, the independent variables are the factors that do not depend upon the other factors, on the other hand, dependent variables depend on independent variables.
In the experiment they used three different solutions ate three different water solutions. One is pure, 100% distilled water, a second is 50% water and 50% corn syrup, and the third is 100% corn syrup, all are three independent solutions.
The independent variable is the cause which does not depend on any other factor in your study, all the solutions are different mixtures creating different variables.
Therefore, the solutions used for eggs are the independent variable.
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The given question is incomplete, so the most probably the complete question is,
Leah, LaRenda, and Gabi decide to test what factors influence water absorption by an egg. They remove the shell from 3 eggs by dissolving them in vinegar. They create three different water solutions. One is pure, 100% distilled water, a second is 50% water/50% corn syrup, and the third is 100% corn syrup. The mass of each egg is measured before they are put into a single solution for 24 hours. The mass of the eggs is then measured, and the data is recorded below:
In this experiment, the independent variable they are testing is?
Carbon in the ocean originates from the atmosphere.
lease select the best answer from the choices provided
true or false
Answer:
true
Explanation:
Carbon in the ocean originates from the atmosphere; that is true as the carbon in the ocean's main source is the atmosphere, where carbon dioxide (CO2) dissolves into the surface waters of the ocean through a process called gas exchange.
What is the role of carbon ?Carbon is an essential element for life on Earth, and it cycles through various reservoirs such as the atmosphere, ocean, land, and biosphere, the ocean is a major carbon sink, meaning it stores large amounts of carbon. But carbon dioxide is a greenhouse gas that is naturally present in the atmosphere, and its concentration has increased significantly over the past century due to human activities such as burning fossil fuels that harm all living organisms.
As a result, carbon in the ocean comes from the atmosphere; this is true.
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The yellow ring inside the bacterial cell represents the bacterial DNA. Why does this structure disappear by step 3(this is when replication of viral nucleic acid and protein and envelope.) of the lytic cycle?
Answer:
When the virus injects it’s nucleic acid into the cell it uses the cell’s ribosomes to make virus proteins and those proteins are the main cause for the break up of the cell’s DNA.
The bacterial DNA structure will disappear because of ; The usage of the ribosomes of the bacterial cell by the nucleic acid injected by the virus.
The lytic cycle which is one of the cycles of viral reproduction is the cycle which leads to the breakup of the DNA of the cell ( i.e. destruction of the host cell and its membrane).
Therefore the yellow ring inside the bacterial cell will disappear by step 3 after which the nucleic acid is injected into the host cell by the virus .
Hence we can conclude that the bacterial DNA structure will disappear because of the usage of the ribosomes by the nucleic acid from the virus
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in organisms that reproduce sexually, through what type of cells are mutations passed to offspring
Answer: reproductive cells .
Explanation: (sperm or eggs)
The preserved remains of trilobites suggest that these organisms lived in the seas for about 380 million years. They also indicate that all trilobites originated in Siberia and then branched out to different locations.
This information is and example of which form of
evidence for evolution?
A. comparative anatomy
B. fossils
C. embryology
help?
Which list correctly orders the forms of radiant energy by increasing
wavelength?
A. infrared light, radio waves, ultraviolet light, visible light
B. visible light, ultraviolet light, radio waves, infrared light
C. radio waves, visible light, ultraviolet light, infrared light
D. radio waves, infrared light, visible light, ultraviolet light
Answer: Option D.
radio waves, infrared light, visible light, ultraviolet light.
Explanation:
Radiant energy is energy electromagnetic radiation that travels by waves or particles. It is measure in Joule. There are different type of electromagnetic radiation and they are defined by the amount of energy, photons and wave lengths.
Radio waves have photons with low energies and wavelengths, microwaves have little, infrared waves have more than the two, ultraviolet have more, x rays have more energy photons and wavelengths, then gamma rays have more.
what are the forelimbs of a chimpanzee adapted for?what are they adapted for in humans
Answer:
Chimpanzees, the closest living relatives to modern humans, developed numerous adaptations to survive. Their large brains enable complex decision making, social skills, and tool making. Their body adaptations allow for grasping, propulsion and climbing.
Explanation:
Explanation:
The forelimb of a chimpanzee is adapted for climbing trees and swinging fr branch to branch.
The forelimb of a human is adapted for grasping associated with opposable thumb.
Catching fish faster than they can breed is called: A. Intertidal zone B. Tilapia C. Overfishing D. Catch-release
Answer: its C
Explanation: overfishing
Answer:
The answer is Overfishing (Aka C)
Explanation:
what activities are ways to reduce the negative impacts humans have on earths resources? select two options.
eroding river banks
moving to urban settings
monitoring air quality
burning fossil fuels
building marine refuges
Answer:
monitoring air quality and building marine refuges
The activities that reduces the negative impacts humans have on earths resources are :
Monitoring air quality ( C ) Building marine ( E )Human activitiesActivities of humans leave both negtive and positive effects on the earth and but to reduce the negtive impacts of humans on earth certain activities such as monitoring air quality which helps to regulate air pollution and also building marine refuges are some the positive human activity that can help reduce the negtive effects of certain human activity.
Hence we can conclude that The activities that reduces the negtive impacts humans have on earths resources are : Monitoring air quality and Building marine.
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Explain why decomposers are an important part of a food chain.
Answer:
Decomposers are vital to the food chain because they help recycle nutrients back into the system.
Explanation:
Decomposers like fungi and bacteria play most important role. They break down material that are dead or unused and turn them into nutrients in the fields or soil that plants use to grow.
Answer:
Decomposers are the organisms which change over complex materials into less difficult ones, often changing organic materials into inorganic ones. This, in turn, makes those assets available for use by other organisms. Decomposers, then, are crucial to the cycling of supplements in the ecosystem.
According to cell theory which is made of cells
Answer:
All units of life
Explanation:
Answer:
All living things.
Explanation:
_______________ form the base of the marine food web.
a. zooplankton
b. phytoplankton
Answer:
B
Explanation:
what is job of sperm cells?
Answer:
The function of a sperm is to pass on the necessary biological information required to produce a new organism
Phytoplankton can gain nutrients from whale poop.
True
False
Answer:
True
Explanation:
Researchers believe rebuilding populations of great whales could significantly increase the vast amount of atmospheric carbon absorbed by tiny marine algae called phytoplankton, which rely on nutrients from the leviathans’ fecal plumes.
(bbc word news)
Answer:
true
Explanation:
Find an everyday product in your home that has at least some synthetic materials. Write a paragraph tracing its lifecycle.
(I don’t care what the product is, the paragraph can have a minimum of 5 sentences.)
Answer:
The everyday product in my home having synthetic material is non-stick pans. it is used in everyday for cooking purpose. The modern non-stick pans have a coating of Teflon (PTFE or polytetrafluoroethylene) and teflon is a synthetic fluoropolymer. it is constitute of many strong carbon-fluorine bonds which allow it resistant to solvents.
The average lifecycle of non-stick pan is five years and your its last days will be seen when the surface starts to peel. It is advice to change the non-stick cookware after few years as it can affect the food and health of a person.
Which of the following is NOT an example of mechanical digestion? MULTIPLE CHOICE.
A. Amylase breaking down starch in the mouth
B. Churning of food in the stomach
C. Segmentation of food in the small intestine
D. Chewing of food in the mouth
Answer:
C segmentation of food in the small intestine
Explanation:
mechanical digestion occurs only in the mouth and that is the only one that does not occur in the mouth.Even though Both mechanical and chemical digestion occur in the mouth. ... The muscles in the stomach walls churn the bolus (mechanical), allowing it to mix with digestive enzymes and gastric acids (chemical). This process converts the bolus into a liquid called chyme. Digestion continues in the stomach for several hours. so c is the answer
Can someone please fill in the chart correctly.
Which organisms does the mouse in the food web provide energy for?
a. deer and snake
b. hawk and coyote
c. grasshopper and snake
d. butterfly and hawk
Answer:
The answer is B.
Explanation:
In this food web, you can see that snake, coyote and hawk feed on mouse in order to get energy.
Which best describes reproduction?
Answer:
A sexual reproduction produces offspring that are identical to the parent. Sexual reproduction allows for diploid gametes to combine to increase genetic variation.
Large-scale evolutionary trends are the result of _____.
-artificial selection
-macroevolution
-phenotypic variation
-microevolution
Answer:macroevolution
Explanation:
Answer: b. macroevolution
Explanation: gradpoint/pearson
An essential material for photosynthesis is/are:
a. nitrogen
b. chlorophyll
c. chloroplasts
Answer:
B
Explanation:
i did this two months ago and its the only one i remember
how are the inorganic and organic fertilizers important in agriculture?
Answer:
It helps grow food and large amounts of it to feed the nation!
Explanation:
Fertilizer maintains the soil fertility, so the farmer can continue to grow nutritious crops and healthy crops. Farmers turn to fertilizers because these substances contain plant nutrients such as nitrogen, phosphorus, and potassium. Most farmers today use fertilizers that are either mined or manufactured.
Answer:
In addition to releasing nutrients, as organic fertilizers break down, they improve the structure of the soil and increase its ability to hold water and nutrients. Over time, organic fertilizers will make your soil–and plants–healthy and strong.
Explanation: