How much of earth's atmosphere is oxygen

Answers

Answer 1
Answer- 21 percent : )

Related Questions

23. (7. L.44.6) Selective Breeding is a way of insuring that a certain trait is maintained in
a breed. True or False
a. True
b.
False

Answers

Answer:

A. True

Explanation:

Selective Breeding is when humans select two parents that have beneficial phenotypic traits to reproduce and have offspring with those desired traits.

True Selective breading is when humans use animal breeding and plant breeding to selectively develop particular traits

Which cell has a round shape? Plant Cell or Animal Cell? Choose one!

Answers

The answer is an animal cell.

you're welcome

During the prophase 1 portion of meiosis, ______________________ happens, which is an exchange of genetic material between chromosomes.

Answers

Answer:

Recombination

Explanation:

Answer:

I think it's crossing over

Explanation:

10 POINTS!!
if a man with type BO blood has a child with a woman that has type AB blood, what is the percent probability that their child will have type AB blood?

Answers

The percentage for the child to have AB blood is 25%. Since BOxAB=BA,BB,AO, and OB, then each of them all of 25% to be the child’s blood type. 100% divide 4=25%.

If a man with type BO blood has a child with a woman that has type AB blood, then the percent probability of the child with blood type AB will be 25%.

What is Blood typing?

A blood type is a classification of blood, which is based on the presence and absence of the antibodies and inherited antigenic substances on the surface of the red blood cells (RBCs). These antigens may be proteins, carbohydrates, or glycolipids, depending on the blood group system.

If a man with type BO blood has a child with a woman that has type AB blood, then the percent probability that their child will have type AB blood are as follows:

Probability of blood type AB = 1/4 or 25%

The probability of the child to have blood type AB will be 25%.

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1. Based on the relative humidity in the room (average for the 3 trials), would a drop of water on your hand evaporate? If so, do you think it would evaporate quickly? Explain your answer. (5 pts)

Answers

Answer:

Yes.

Explanation:

Because the air is not at its max saturation point, which means that it could possibly melt in your hand.

What determines whether a virus goes into the lytic cycle or the lysogenic cycle?

Answers

Answer:

Answer is on the pic

Explanation:

May be this is helpful!

~According to all known laws of aviation, there is no way a bee should be able to fly. Its wings are too small to get its fat little body off of the ground. The bee, of course, flies anyway. Because bees do not care what humans think is impossible~

Answers

Yes, like humans, animals and insects can be determined and optimistic as well.

What does hydrophobic mean?

Answers

Hydrophobic means repelling or failing to mix with water.
Question:

What does hydrophobic mean?

Answer:

The hydrophobic mean "water fearing"/ "the fear of water" , this describe it's the segregation of water and nonpolar substances, which maximizes hydrogen bonding between molecules of water and minimizes the area of contact between water and nonpolar molecules and the meaning the atoms that make the molecule.

#CARRYONLEARNING #STUDYWELL

How could the jackrabbit population suddenly increase?How might this affect the ecosystem?

Answers

If there was a lot of breeding, then the population would increase and this would affect the ecosystem in two ways, there would be less vegetation since the jackrabbits would be consuming more, and the other way it would have an affect is that the predators of jackrabbits would suddenly have more food, meaning there could be an increase in predators, and an increase in predators would affect the jackrabbit population negatively if they’re all being eaten

What is released after the enzyme activity to be used by the organism? *
1 point
Substrate
ОО
ATP
O Products
Nothing

Answers

Answer:

O Products is surely the answer

I WILL GIVE YOU 20 POINTS IF YOU FULLY COMPLETE THIS ASSIGNMENT!!! AND MAKE YOU THE BRAINIEST!!!

Answers

G1 is growth 1. This is where the cell is growing and doing normal tasks. The cell spends most of its life here.

S is synthesis. This is where DNA is being copied/replicated. This is the first step towards mitosis.

G2 is the growth 2 stage. This is where the cell is preparing for mitosis. The cell is doing final preparations in this stage.

M is mitosis. Mitosis is the process of cell division. This can further be separated into “PMAT-C” or prophase, metaphase, Anaphase, Telophase, and Cytokinesis.

What happens to the motion of O2 molecules as the air temperature drops below 0 °C?

Answers

Answer:

they slowdown

Explanation:

Ribosomes produce proteins by protein synthesis,
A)True
B)False

Answers

Answer:

A) True

Explanation:

As the atmosphere and Earth's surface materials absorb ultraviolet light, visible light, and infrared energy, they gain thermal energy and their temperatures rise. Which of the following best explains why the dry and sandy areas of deserts are hotter than the water in oases, even when the areas are both at the same latitude and altitude?

A. Water's ability to moderate temperature is less than that of sand.

B. Water's ability to morerate temperature is greater than that of sand.

C. Water is a polar molecule that reflects heat energy with like eletrical charges.

D. Water is a polar molecule that attracts hear energy with opposite electrical charges.

Answers

B........................

The dry and sandy areas of deserts are hotter than the water in oases, because of the water's ability to moderate temperature is greater than that of sand. Thus, the correct option is B.

How does water moderate temperature?

Water has a high specific heat capacity which makes it absorb a lot of heat energy before it actually begins to get hot or raise the temperature of the water body. The specific heat of water has a huge role to play in the Earth's climatic conditions and it also helps to determine the habitability of many of the geographical locations around the globe.

The dry and sandy areas of deserts are hotter than the water in oases, even when the areas are both at the same level of latitude and altitude because of the water's ability to moderate the temperature than that of sand.

Therefore, the correct option is B.

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If a DNA sample is 14% cytosine (C), what percent is thymine (T)?

Answers

Answer:

Thymine = 36%

Explanation:

Since cytosine and guanine are found in similar quantities, their sum can clearly be divided by 2.

As there are only four bases in DNA, you know, all four bases combined must be equal to 100% of the sample. Provided the knowledge that the sample is 20 percent guanine, because guanine and cytosine pair with each other, you might presume it is also 20 percent cytosine. That is, together, 40 percent of the overall sample

compare and contrast convergent and divergent evolution

Answers

Explanation:

Convergent evolution is the process where two or different species develop similar traits, in spite having the different ancestor. An example is wings of birds, bats, insects. Whereas Divergent evolution gives rise to new species which may be similar in function but morphologically different from their ancestors.

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where do the products of photosynthesis come from? a. we exhale them b. plants c. we inhale them d. animals e. a chemical reaction that breaks glucose down

PLEASE HELP!

Answers

Answer:

They come from the plants

Explanation:

The products are thing things that are pruduced after a process, after photosynthises the PLANT lets out oxegyn wich is a product of photosynthises. Hope it helped;)

The finished product or waste that forms as a result of a process is known as _______.

Answers

Answer:

output thank me later

Explanation:

Write the letter of the pair of terms or phrases in the space provided that best completes the analogy
shown. An analogy is a relationship between two pairs of words or phrases written as a : b :: c : d.
The symbol : is read “is to,” and the symbol :: is read “as.”
_____ 1. element : compound ::
a. gold : sodium
b. erosion : water
c. solution : acid
d. metal : alloy

Answers

Answer:

d. metal : alloy

Explanation:

a compound is a combination of multiple elements, just as an alloy is a combination of multiple metals.

for example, water is a compound made of hydrogen and oxygen, and brass is an alloy of zinc and copper

Which part of the spine is likely to cause a nerve signal to travel faster

Answers

Answer:

Gaps between the Schwann cells are called nodes of Ranvier. These nodes permit an impulse to travel faster because it doesn't need to depolarize each area of a membrane, just the nodes.

Explanation:

A student put a half teaspoon of yeast in each of three

different balloons. Then he added a quarter cup of water to each balloon. Each balloon received water of a different temperature: hot, warm, and cold. After adding the water, the student tied off the end of each balloon to seal it shut. The yeast began to produce bubbles of gas inside the balloons. After 20 minutes, the student measured the circumference of each balloon to determine how much it had grown in size.

What is the responding variable in this experiment?

Answers

Answer: I have the same question!

The choices are

A. The temperature of the water balloon

B. The amount of water placed in the balloon

C. The circumference of the balloon

D. The amount of yeast placed in the balloon

I think its D

Your experiment looked at the effect of water temperature on yeast growth.

What is water temperature?The temperature of water is a physical property that expresses how hot or cold it is. Because hot and cold are arbitrary terms, temperature can also be defined as a measurement of a substance's average thermal energy 5. Room temperature (20°C / 68°F) for maximum flavor or chilled cold (6°C / 43°F) for maximum refreshment are the best temperatures for drinking water. A thermistor, a metallic device that undergoes a predictable change in resistance in response to temperature changes, can be used to measure water temperature. This resistance is measured and converted into a temperature in Celsius, Fahrenheit, or Kelvin.

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12. A landslide is an example of?

Answers

Motion , an unknown force caused the rocks to have a negative reaction and fall and cause a chain reaction , hope this helped
i’m not sure if it is multiple choice but my answer is natural disaster or disaster

what factor affects eyewitness testimony

Answers

Answer:

Anxiety and stress

Explanation:

Logging activities can improve the economy. However, if this activity is done without control, it can have a negative effect on biodiversity. Explain. *​

Answers

Answer:

Logging can impact climate change by increasing the amount of free carbon dioxide in the atmosphere. Plant life stores carbon dioxide within its tissues. Deforestation often goes hand in hand with fire, which releases this stored carbon dioxide into the air, compounding the greenhouse gas effects.

It is a contribution of different discoveries about cells that laid the groundwork for other fields of science.
A. The Microscopic Theory
B. The Theory of Evolution
C. The Cell Theory
D. The Theory of Spontaneous Generation

Answers

Answer:

I think its D or B. Not sure but its either one

A. The Microscopic Theory is the contribution of different discoveries about cells that laid the groundwork for other fields of science.

Although the theory of evolution, the cell theory, and the theory of spontaneous generation are related to cell but they cannot be directly related to other fields of science. The microscopic theory can be related to other fields of science as it can applied in biology, and physics as well. In biology the microscopy can be used to view the cells their structure and function. In physics it can be used to study the dynamics of microscopic structure and structure and function of lenses.

Hence, A. the microscopic theory is the correct option.

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Based on context clues what does impartial mean in the following sentence? Journalists can cover anything they choose and from any viewpoint whether impartial or intentionally biased

Answers

Answer:

The correct answer is - not favoring anyone or taking any sides and representing facts fairly.

Explanation:

The meaning of the word "impartial" is to be fair to everyone and not being biased to any particular side. In this context, it has the same meaning as in this sentence it is stated that a journalist can cover anything or any topic or news with any viewpoint they want.

It could be impartial, which means not biased and fair on the basis of facts, or might be biased as per their interests. The meaning of the word impartial is same in this context.

20 POINTS

NEED ASAP

A. What is the function of the genes in DNA molecule?

B. How is DNA compacted to form a chromosome?

C. How is the cell divided during mitosis?

Answers

a. Genes are a section of DNA that are in charge of different functions like making proteins. Long strands of DNA with lots of genes make up chromosomes. DNA molecules are found in chromosomes. Chromosomes are located inside of the nucleus of cells.

b. DNA is tightly packed up to fit in the nucleus of every cell. As shown in the animation, a DNA molecule wraps around histone proteins to form tight loops called nucleosomes. These nucleosomes coil and stack together to form fibers called chromatin. Chromatin, in turn, loops and folds with the help of additional proteins to form chromosomes.

c. Mitosis is the phase of the cell cycle where chromosomes in the nucleus are evenly divided between two cells. When the cell division process is complete, two daughter cells with identical genetic material are produced.

A. To carry out these functions, DNA sequences must be converted into messages that can be used to produce proteins, which are the complex molecules that do most of the work in our bodies. Each DNA sequence that contains instructions to make a protein is known as a gene.

B. To package DNA inside the nucleus, cells wrap their DNA strands around scaffolding proteins to form a coiled condensed structure called chromatin. Chromatin is further folded into higher orders of structure that form the characteristic shape of chromosomes.

C. During mitosis, a cell duplicates all of its contents, including its chromosomes, and splits to form two identical daughter cells. ... Meiosis also allows genetic variation through a process of DNA shuffling while the cells are dividing.

which diagram shows photosynthesis with the correct reactants and products?

Answers

The correct diagram is the top one, hope this helps!

The diagram shows photosynthesis with the correct reactants

and products is the top one.

What is photosynthesis?

This is the process carried out by green plants in the production

of their food in the presence of sunlight.

The reactants are Water and Carbon dioxide while the products

are Glucose and Oxygen which is depicted ion the top diagram.

The reaction can be seen below:

6CO₂+ 6H₂O → C₆H₁₂O₆ + 6O₂

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PLEASE HELP WILL GIVE BRAINLIEST A(n)
shows the relationships among all species in an ecosystem.
O A) energy pyramid
B) food chain
OC)
food web
O D) environmental change​

Answers

Answer:

the food chain

Explanation:

every species in the ecosystem eats or gets eaten

B but I’m not sure.

A cell makes and secretes a certain protein. Explain where it is made, how it is secreted from
the cell, and what kind of transport is used.

Answers

Answer:

is this a question

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