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Elis [28]
3 years ago
12

Nitrogen is used to produce a. proteins b. DNA c. both proteins & DNA

Biology
2 answers:
goblinko [34]3 years ago
8 0

Answer: C

Explanation: Nitrogen is important to the chemical industry. It is used to make fertilisers, nitric acid, nylon, dyes and explosives. To make these products, nitrogen must first be reacted with hydrogen to produce ammonia. This process is done by the Haber process.

AlekseyPX3 years ago
3 0

Answer:

c

Explanation:

Nitrogen has a number of important uses. It can be used to replace air and eliminate oxidation of materials. Its most important use is in creating ammonia, which in turn is used to make fertilizer and explosives. Liquid nitrogen is used as a refrigerant for very low temperatures

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You want to test whether duration of light exposure affects fish reproduction. What would be your control group and experimental
Triss [41]

Answer and Explanation:

During an experiment, data from an experimental group are compared with the data of a control group. These two sets are identical in all aspects except for the independent variable that the researcher changes in the experimental group to observe how they affect the individuals. This variable keeps constant in the control group.

The experimental group is the one that receives the experimental procedure, with changes in the independent variable.  There can be several experimental groups.

In the control group, the variable measured keeps constant, not influencing the results. This isolates the effect of the independent variable on the experiment and helps to find alternative explanations to the different results.

In the exposed example:

  • Control group: Certain amounts of fishes exposed to a normal number of light hours per day. For example, if under natural conditions in its original environment the species is exposed to 12 hour light, then the control group should be exposed constantly to 12 hours light a day to maintain its normal reproductive levels.
  • Experimental group: Certain amounts of fishes, equal to the control group, exposed to a different number of light hours per day. For example, there might be 5 experimental groups: one of them exposed to 4 hours light, a second group exposed to 8 hours light, the third group exposed to 12 hours light (The same as the control group), the fourth group exposed to 16 hours light, and the fifth group exposed to 20 hours light.

Except for light, the rest of the variables should be the same for all the groups.

8 0
3 years ago
Clinical manifestations of extracellular fluid volume excess include which of the following? (Select all that apply.) Edema Crac
Veronika [31]

Answer:

Neck vain

Explanation:

8 0
3 years ago
I need help please!!!!!!
Anna [14]

Answer:

The correct answer is - 2. Helium.

Explanation:

Nuclear fusion is a reaction that involves the fusion of two or more atomic nuclei to make different atomic nuclei with subatomic particles and releases a huge amount of energy.

Two hydrogen molecules with one proton and one neutron fused together to make a larger helium molecule with two protons and two neutrons and release a huge amount of energy.

1H^2+1H^2 ====> 2He^4 + energy

4 0
3 years ago
Which organelle packages proteins in vesicles and sends them to the body where they are needed
qwelly [4]
It modifies and packages proteins and lipids made within the cell, and sends them out to where they are needed. The cell's endoplasmic reticulum (ER) generates biological raw materials, packaging them in membrane-enclosed bubbles called vesicles, for transport to the Golgi.
3 0
3 years ago
Read 2 more answers
When water diffuses into a plant cell and builds up firm pressure that is called?
iren2701 [21]
<span>This is turgor pressure. This is the mechanism by which a plant and its cell walls can maintain its rigidity. The movement of water between the cell walls and the inside of the plant allows for pressure to build up due to this diffusion, leading to a stiffness on the part of the plant.</span>
6 0
3 years ago
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