"Nitrogen-fixing bacteria and nitrifying bacteria convert atmospheric nitrogen into different compounds of nitrogen such as: (a) ammonium lon, (b) ammonia. (C) nitrate ion, and (d) nitrite ion. Which of the following is the correct sequence of formation of the nitrogen compounds?

a. "a, b, c, and d
b. "b, a. d. and c"
c. " b, a. c, and d"
d. "d. a. b, d, and c

Option B.

B, a, d and C.

Explanation:

Nitrogen cycle refer to pathway in which nitrogen flow from the atmosphere to the ecosystem.

Nitrogen is essential for plant growth and development . It is a components of protein and DNA.

Nitrogen fixing bacteria are microorganisms that are found in the root nodules of leguminous plants. The convert atmospheric nitrogen into ammonia.

Ammonia is easily converted to ammonium in the soil which the plants can absorb , it is a process called nitrogen fixation.

Nitrifying bacteria are found in the soil. They convert ammonia in the soil into nitrites and then nitrates by a process called nitrification.

Nitrogen compounds like nitrites, nitrates, ammonia and ammonium can easily be absorbed by plant root in the soil.

Animals eat plants and take-up nitrogen in their bodies. When plants and animals die, they decay by the activities of decomposer and denitrifying bacteria convert nitrates in the soil to nitrogen gas, which return back to the atmosphere.

q: compare the parts of a cell and the cell as a whole to another common nonliving system (i.e., a car, a city,

a:

comparing this to the inside of a food building/company.

all cells are surrounded by a plasma membrane, which protects the cell from its environment, keeping toxic substances out of the cell. it regulates which molecules are allowed to enter and exit the cell.

regulates all cell activity such as cellular metabolism, and growth in addition to storing and maintaining the cell's dna for transcription and replication. determines what proteins to make.

contains the organelles; site of most cell activity

the place where ribosomes do their working activity.

builds the proteins.

prepares proteins for use or export.

responsible for breaking down and absorbing materials taken in by the cell.

maintains cell shape.

transforms one form of energy into another.

i think the answer is composed of atoms