The correct answer is A.
Animal cells do not have a cell wall.
A cell wall is the rigid, outermost covering of plant cells and is made up of cellulose. It is absent in animal cells. The cell wall is visible under a light microscope.
Animal cells are instead covered by a cell membrane. It is made up of lipids, proteins, and small amounts carbohydrates. It is a thin and delicate structure that can only be seen using an electron microscope.
Answer:
It doesn't preserve Biodiversity.
Explanation:
I took the test.
Answer:
b. a trace or print, or the remains of a plant or animal of a past age preserved in Earth or rock
Explanation:
Fossils are remains or prints of extinct species that are slowly filled in with sediment over time.
Why is it important?
- Because when bacteria converts ammonia into nitrate and nitrite, producers need them to make proteins and then consumers eat the producers and reuse the nitrogen to make their own proteins.
