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Sever21 [200]
3 years ago
7

What percent (%) of the atmosphere is made up of nitrogen?

Biology
1 answer:
maks197457 [2]3 years ago
7 0

Answer:

B

Explanation:

The air in Earth's atmosphere is made up of approximately 78 percent nitrogen and 21 percent oxygen.

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All organisms on earth share certain characteristics, but an actual definition of life is not simple. Why?
algol13

Answer:

An <em>organism </em>is any individual living thing but the definition of life is not simple because humans determine what meets the criteria of living and nonliving. However, this does not mean that humans are perfect when it comes to categorization. Viruses fall into a middle area between being classified as living or nonliving since viruses have some, but not all, of the characteristics required to be classified as living.

~Hope this Helps!~

8 0
3 years ago
Which of the following is true? When a nucleus is separated into its constituent protons and neutrons, the sum of the masses of
Vadim26 [7]

Answer: the sum of the masses of the individual protons and neutrons is less than the mass of the stable Nucleus

Explanation:

Nuclei fission involved bonds breaking with the loss of quantity of Energy by the protons and Neutrons

Remember : e=mc2

Therefore, this breakage of bonds result in loss in masses of p and n.

However, in intact Nucleus the energies of the p and n are trapped in the intact bonds holding them together therefore heavier masses than when broken down.

7 0
3 years ago
What cycle is used to make fats and oils
zloy xaker [14]

Answer:

citric acid cycle

Explanation:

To give just one example, acetyl CoA (mentioned above) that's produced in cellular respiration can be diverted from the citric acid cycle and used to build the lipid cholesterol. Cholesterol forms the backbone of the steroid hormones in our bodies, such as testosterone and estrogens.

6 0
3 years ago
_________ is an organ of the alimentary canal?
vovangra [49]

Answer:

Small intestine

Explanation:

The given question has not provided the options neither they are found anywhere therefore it can be assumed that the examiner is asking the most important organ of the alimentary canal.

The alimentary canal is the hollow tube-like structure formed inside the human which are associated with the digestion of the food material. The main organs of the alimentary canals are the oesophagus, stomach and the intestine.

The intestine is the main organ of the canal as it is associated with the digestion of the complex biomolecules and the absorption of these nutrients.

Thus, the small intestine is the correct answer.

5 0
3 years ago
Using the characteristic chart provided, which of the following characteristics would absolutely identify a flowering plant and
kotegsom [21]
A describes a gymnosperm.

B describes any type of plant.

C is too vague to even describe a plant.

D (the correct answer) describes an angiosperm (flowering plant). After double fertilization, angiosperms form a fruit over the ovulary of the plant, where the seeds are located.
6 0
3 years ago
Read 2 more answers
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