My answers are in the brackets

Nitrogen is cycled through an ecosystem by both plants and ?(animals).

Decomposers break down dead organisms and their waste products to release
?(ammonia)

in a process called ?(nitrification)

These ?(decomposers) can then be used by plants to make amino acids. The process of converting nitrogen in the atmosphere to ammonia is called ?(nitrification)

This process is carried out by bacteria that live in ?(watery soils)
and in ?(the ground)

Plants can absorb both ?(nitrates) and
?(nitrogen gas) from the soil, but animals cannot. Animals obtain
?(nitrates) by eating plants and other organisms and then digesting the proteins they contain.

To answer the questions:

1. Nitrogen is cycled through an ecosystem by both plants and animals. (Explanation: Nitrogen is an essential element for living organisms, and it moves through the ecosystem in a process called the nitrogen cycle. Both plants and animals play roles in this cycle.)

2. Decomposers break down dead organisms and their waste products to release ammonia. (Explanation: Decomposers, such as bacteria and fungi, break down organic matter and release ammonia as a byproduct. This process is known as decomposition.)

3. This process is called nitrification. (Explanation: Nitrification is the conversion of ammonia into nitrite and nitrate by nitrifying bacteria. It occurs in two steps, first converting ammonia to nitrite and then nitrite to nitrate.)

4. Decomposers can then be used by plants to make amino acids. (Explanation: Amino acids are essential building blocks for proteins, and plants require nitrogen to synthesize them. Plants obtain nitrogen by absorbing nitrates and other nitrogen compounds produced by decomposers in the soil.)

5. The process of converting nitrogen in the atmosphere to ammonia is called nitrification. (Explanation: The process of converting gaseous nitrogen in the atmosphere into a usable form, such as ammonia, is known as nitrogen fixation. Nitrification is a subsequent step in which ammonia is converted into other nitrogen compounds.)

6. This process is carried out by bacteria that live in watery soils and in the ground. (Explanation: Nitrifying bacteria are present in both aquatic environments, such as wetlands or freshwater ecosystems, as well as in soil. They perform nitrification by metabolizing ammonia and converting it into other nitrogen compounds.)

7. Plants can absorb both nitrates and nitrogen gas from the soil, but animals cannot. (Explanation: Plants have the ability to take up nitrates from the soil through their roots and incorporate them into their metabolic processes. Animals, on the other hand, do not have the necessary mechanisms to directly absorb or utilize nitrogen gas or nitrates from the soil.)

8. Animals obtain nitrates by eating plants and other organisms and then digesting the proteins they contain. (Explanation: Animals acquire nitrates indirectly by consuming plants or other organisms that have already processed nitrogen into organic compounds, such as proteins. These organic compounds are then broken down during digestion to release the nitrates, which are further utilized by the animal's body.)