Answer:
i dont kno
Explanation:
If 22% of a DNA sample is made up of cytosine, C, what percentage of the sample is made up of adenine,
A?
Answer:
28% of Adenine
Explanation:
Chargaff's Rule states that A = T and C = G
Because of that, the sample must have the equation:
A + C = T + G
G must have the same amount as C so,
A + .22 = T + .22
Both sides of the equation must equal each other by .50, so .50 - .22 = .28
.28 x 100 = 28%
If 22% of a DNA sample is made up of cytosine, C, the percentage of the sample is made up of adenine, A is 28%
What is DNA?The DNA sequence is the sequence or pairing of DNA bases. RNA and DNA both are genetic materials and both are made up of nucleic acids made up of deoxyribose acid and iron is made up of ribonucleic acid.
DNA and RNA both contain four bases that are joined with hydrogen bond RNA contain uracil in the place of thymine and DNA contain timing all other bases are the same.
Chargaff's Rule states that A = T and C = G
Because of that, the sample must have the equation:
A + C = T + G
G must have the same amount as C so,
A + .22 = T + .22
Both sides of the equation must equal each other by .50, so .50 - .22 = .28
.28 x 100 = 28%
Therefore, the percentage of the sample is made up of adenine, A is 28%
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What scientist used radioactive bacteriophages to prove DNA is the
hereditary material passed from one generation to the next?
Answer:
Alfred Hershey and Martha Chase
Explanation:
In 1952 Alfred Hershey and Martha Chase were working with bacteriophages or phages, which are viruses that infect bacteria. They knew that a phage had an outer shell of protein and an inner core of DNA. In addition, from the electron microscope observations, they also knew that during infection the virus attacks the bacterium by its tails and introduces its genetic material into the bacterium to multiply using its metabolic machinery. They radioactively labeled two sets of phages: one with 32P (which marks only DNA) and another with 35S (which marks only proteins). In two parallel experiments, they infected bacteria with viruses marked on their DNA and with viruses marked on their proteins. The cultures were shaken with a mixer to separate the virus particles from the bacterial coatings. They then performed a centrifugation to separate the phages from the bacteria, so that the larger and heavier bacteria remain in the pellet, while the phages remain in the supernatant. They found that the radioactivity of 35S appeared in the supernatant while that of 32P appeared in the sediment, from which new radioactively labeled virus particles appeared, demonstrating that DNA was the genetic material.
An area where an organism finds food, shelter and
water in a specific arrangement
Name two types of proteins that regulate the cell cycle. How do these proteins work?
Answer:
Internal and external regulators are two types of proteins that regulate the cell cycle. Internal regulators allow the cell cycle to proceed only after certain events occur. External regulators speed up or slow down the cell cycle.
Explanation:
I hope this helps :)
The two types of proteins that regulate the cell cycle are Cyclins and Cyclin-dependent Kinases (CDKs). These two groups of proteins are responsible for the progress of the cell through various checkpoints.
What are Proteins?
Proteins are made up of hundreds or thousands of smaller units called Amino acids. They are large, complex molecules that play many critical roles in the body. They do most of the work in cells and are required for the structure, function, and regulation of the body’s tissues and organs.
Cyclins regulate the cell cycle only when they are bound to Cdks and become fully active. The Cdk/cyclin complex must be phosphorylated, which further initiates other proteins to be phosphorylated that advances the cell cycle.
Retinoblastoma (Rb), is another group of tumor-suppressor proteins that regulates the cell cycle by monitoring the cell size.
Therefore, there are two types of proteins that regulate the process of the cell cycle are Cyclins and Cyclin-dependent Kinases (CDKs).
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PLZZZ HELP ASAP DUE TMR THX
Answer:
I'm not rlly sure but i think the bigger animal ate the smaller one because after there are no more steps of him (the smallest)
Explanation:
1. Which of the following is NOT correct? PLEASE HELP I WILL MARK BRAINLIEST
A) A population is all the organisms of the same species that live in the same area
B) A community is all the populations of different species that live together in the
same area
C) A population is all the populations of different species that live together in the same area
D) An ecosystem is all of the living and nonliving things in an ares
a population is all the populations of different species that live together in the same area is the incorrect one
HELP PLEASEE!!
You will build a simulation of a population using the same elements as the simulation pictured here and show how
the traits in this population change in years 5 and 10.
- Trait A
- Trait B
- Trait
1 circle = 50 organisms
Start off with 2,500 plants of which 50% have medium-tip leaves, 25% have wide-tip leaves, and 25% have drip-tip
leaves. Each circle in your simulation will represent 125 organisms. Calculate how many circles you need for each
trait, and then create your simulation. Be sure to include a key that states the color coding for each trait.
According to the concepts of percentage and proportions, we can make the simulation with 20 circles, each of them representing 125 plants. Traits A = 10 circles. Trait B = 5 circles. Trait C = 5 circles.
To solve this problem, we need to know two concepts, percentage and proportion.
What is a percentage?A percentage can be defined as a fraction or a part of 100. It is denominated as percent (symbol %).
100 refers to the number of parts into which the unit has been divided.
So, X% means that for every 100 parts, X parts are of our interest. Or, that we are interested in X fraction from a total of 100 parts.
What is a proportion?A proportion is the equal relationship between two determined ratios or quantities.
In the exposed example we need to represent this population of 2500 plants with circles.
We know that,
Each circle represents 125 plants50% of the population have medium-tip leaves, 25% have wide-tip leaves, and 25% have drip-tip leaves .So here, our unit is the population. We can say that our population of 2500 plants is composed by 100 subunits or parts.
2500 plants ------------ 100 parts
So now we will calculate how many plants are represented by the 50% and 25% of the population.
If 100% of the population equals 2500 plants, how many plants are 50% of the population and 25% of the population.
100% -------------------- 2500 plants
50% -------------------- X = (50% x 2500 plants) / 100% = 1250 plants.
25% ---------------------X = (25% x 2500 plants) / 100% = 625 plants
Now we know that from the total of 2500 (100%) plants,
1250 (50%) have medium-tip leaves, 625 (25%) have wide-tip leaves, and 625 (25%) have drip-tip leaves.Finally, we need to calculate how many circles represent these numbers. So, we know that 1 circle equals 125 plants. The question is, how many circles represent 2500, 1250 and 625 plants.
125 plants ----------------- 1 circle
2500 plants -------------X = (1 circle x 2500 plants) / 125 plants= 20 circles.
1250 plants --------------X = (1 circle x 1250 plants) / 125 plants = 10 circles.
625 plants ---------------X = (1 circle x 625 plants) / 125 plants = 5 circles.
So, our simulation must have 20 circles, from which
10 circles represent medium-tip leaved plants (Trait A), 5 circles represent wide-tip leaved plants (Trait B), and the remaining 5 circles represent drip-tip leaved plants (Trait C).In the attached files you will find the image.
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Algae produce food by the process of....?
Answer:
Photosynthesis
Explanation:
what is a population?
The by-product of photosynthesis is nitrogen ?
O True
O False
Answer:
flase
Explanation: photosynthiesis is oxygen and carbon dixocide
Answer:
false
Explanation:
The byproduct of photosynthesis is oxygen not nitrogen
After a devastating forest fire, the surrounding area contained no life. After some time, small plants began to grow along the remaining soil.
Answer:
Yes.
Explanation:
Yes, small plants began to grow along the remaining soil because of the presence of seeds in the soil that sense suitable environmental condition and come out of the soil. The ashes of burn trees have huge amount of nutrients in the form of minerals that triggers the growth of small plants. After the destruction of forest, new plants grow on that land, this type of phenomenon is called ecological succession.
Answer: CORRECT (SELECTED)
Secondary succession
Explanation:
Secondary succession occurs when a previously occupied area is recolonized after a disturbance kills most, or all, of its community.
Scientific knowledge is always changing. At one time, the kingdom was the
highest level of
classification. Today, the highest level of classification is the domain. Two of
the domains, Bacteria and Archaea both contain microscopic prokaryotic
organisms. What would be the best reason for scientists to separate the
prokaryotes?
A)There were too many species of prokaryotes to only have 1 domain for them.
B)It was determined that neither have chloroplasts.
C)Both organisms do not contain organelles.
D)Research showed differences in living environments.
Answer:
d
Explanation:whater
Research showed differences in living environments is the best reason for scientists to separate the prokaryotes. Therefore, option (D) is correct.
What are prokaryotes?The organisms known as prokaryotes lack a nucleus and other organelles in their cells. There are two distinct groups of prokaryotes: the archaea and bacteria, both of which are thought to have evolved along distinct evolutionary lines.
Prokaryotic organisms or prokaryotes are organisms that lack a true nucleus and membrane-bound cell organelles. Mycoplasma, cyanobacteria, and bacteria are all examples of prokaryotes.
A prokaryotic cell carries out every one of the fundamental roles that an ordinary cell performs. Reproduction, respiration, digestion, and other biological processes are among their capabilities.
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What cell part supports the structure of the system plant cell
Answer:
The cell wall provides strength and support to the plant, much like the exoskeleton of an insect or spider (our skeleton is on the inside of our body, rather than on the outside like insects or spiders). The plant cell wall is mainly made up of the carbohydrates molecules cellulose and lignin.
Explanation:
learned this last year
The graph below represents the number of brown and green beetles collected in a particular ecosystem.
what is the change observed in the number of green and brown beetles in the population most likely due to?
A) natural selection
B) gene mutation
C) a common ancestor
D) selective breeding
Answer: A) natural selection
Explanation:
took the test:) hope this helps
Which enzyme breaks down cannabis?
CYP1A5
ALDH
CYP2D6
CYP3A11
CYP2A4
Answer:
I believe it is either CYP2C9 or CYP2D6 that breaks down cannabis.
what is segregation in biology
Segregation describes how pairs of gene variants are separated into reproductive cells
Answer:
Segregation is the separation of allele pairs (different traits of the same gene) during meiosis so that they can transfer specifically to separate gametes.
Explanation:
hope this is helpful! have a wonderful day ! God Bless you and your family <3
What is the term for organisms that consume other organisms for food like animals, some bacteria, and fungi?
Group of answer choices
heterotrophs
autotrophs
herbivores
omnivores
Answer:
Heterotrophs
Hope this helps!
Which are true about changes in carbon dioxide in the Earth's atmosphere since 1860? Select the two correct answers.
A. The increases in carbon dioxide are caused by human activity.
B. The increases in carbon dioxide can be explained by the Milankovitch cycle.
C. The rate of change in carbon dioxide is exponential.
D. The changes are triggered by a new interglacial period.
Answer:
A and C
Explanation:
A. because when we humans are burning maybe our refuse or garbage it will go up to the ozone layer causing air and then it will then result to carbon dioxide.
Who established Buddhism?
A. Confucius
B. Siddhartha Gautama
C. Laozi
D. Ashoka
Answer:B
Explanation:
Answer:
B. Siddhartha Gautama
Explanation:
Siddhartha Gautama, the founder of Buddhism who later became known as “the Buddha,” lived during the 5th century B.C. Gautama was born into a wealthy family as a prince in present-day Nepal.
Period 6 2-25 What percent of offspring from two heterozygous parents will have the dominant phenotype? William Brown. Feb 24 100 points please help
Answer:
75%
Explanation:
If both parents are heterozygous (Ww), there is a 75% chance that any one of their offspring will have a widow's peak (see figure). A Punnett square can be used to determine all possible genotypic combinations in the parents. A pedigree that depicts a dominantly inherited trait has a few key distinctions.
Which of the following does not act as an agent for transporting sediment? O A. Strata B. A light breeze C. Stream water D. A glacier
Answer:
A.Strata
Explanation:
A strata is covering or layers
Answer:
strata
Explanation:
a p e x
Civil engineers want to determine whether the porosity of surface soil affects aquifer recharge rates
Every day the moon rises nearly an hour later than it did the previous day. What is the reason for this?
What is the BEST reason that producers are the most numerous group in an ecosystem?
Answer:
Producers make food and energy for themselves, and don't have to waste any energy hunting or scavenging for food. They also reproduce more effortlessly than consumers, and their genetic diversity is also a factor that keeps them abundant and numerous.
Plz I really need help I don’t know what to write
Kai has a see-through glass tank with air, plants, and animals that eat
those plants. He sealed the tank so no material can get into or out of it,
but light can get in when the tank is not covered.
The light for the tank has been on all day, and Kai measured the carbon
in the air and found that it is decreasing. How is carbon moving between
the air and the living things in
the tank? What is happening to the amount
of carbon in living things?
Just tell me those two questions plz help me I will give you my points I swear plz help me I beg you
The amount of carbon is captured by plants to perform photosynthesis as a light for the tank has been on all day and prepare their own food. The product of photosynthesis is consumed by other organisms to perform cellular respiration.
What are the components of photosynthesis?The components of photosynthesis may include carbon dioxide, water, and sunlight as raw materials to convert into glucose (a food molecule).
The amount of carbon will not remain the same for the entire time in the living organism. The cycling of carbon is processed synergistically during photosynthesis and cellular respiration.
Living things in the tank respire out carbon, which is taken up by plants for photosynthesis, a product of photosynthesis are the reactants for cellular respiration. In this way, carbon delocalized among the living entities.
Therefore, it is well described above.
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Five general characteristics of organisms in kingdoms plantae or fungi are listed in the box.
(24)
The figure C represents Five kingdom classification.
What is Five kingdom classification?
The system of biological kingdoms is the way in which science classifies living things according to their ancestry over the course of evolution.
This means that all the species that make up these five large groups - some recent theories split them further into six or even seven - have common ancestors and therefore share some of their genes and belong to the same family tree.
As well as the kingdoms of living things there are other taxonomic categories within the same classification system such as, for instance, domain, phylum, class, order, family, genus and species.
Therefore, The figure C represents Five kingdom classification.
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5 Based on what you read, do you think communities should keep investing in
hydroelectric dams and wind turbines? Do the benefits of these power sources
outweigh their problems? Explain your answer, using details from both texts.
I
I can't be completely accurate without the texts, but based on my own knowledge I would have to say:
Explanation:
Yes, I think communities should use these green energies because not only does it keep the atmosphere safer and cleaner, it could help tremendously in the case that we run out of fossil fuels before we can find an alternative. Yes there are environmental risks, such as birds dying from wind turbines, but the lack of electricity might be more severe.
If a female spinach plant with flat (FF) green (GG) leaves is crossed (pollination and fertilization occur) with a male spinach plant with crinkly (ff) purple (gg) leaves, what allelles and traits will the offspring inherit?
B) This is an example of what type of reproduction?
All offspring will inherit Ff and Gg and will have flat and green leaves.
B) sexual reproduction
what diseases can affect the digestive system?
what diseases can affect the respiratory system?
how do these diseases in each of these organ systems disrupt homeostasis?
Answer:
Lots of things can effect the lungs and GI systems from virus to bacteria. Any illness in either location can upset homeostasis. homeostasis is just the baseline normal of a human. So, if an illness causes fever then it upsets the balance, both chemical as well as hormonal.
If purple flowers are dominant to white flowers, and a heterozygous purple flower is crossed with a white flower, what is the probability that an offspring will be white? (Hint: draw a Punnett Square). Rr x rr
50%
25%
100%
75%
which one ^