The answer is b it occurs in plant animals and bacteria
C. They are not enclosed by a membrane.
D is incorrect because Ribosomes do not contain DNA, the nucleolus does.
B is also incorrect because they aren't located outside the cell, they're in the cell, on the endoplasmic reticulum.
Hoped this helped :)
1. Cayote’s population would go down because their source of prey has gone down because of poisoning.
2. Squirrels are omnivores, meaning they can still survive without eating meat because they also eat plants (nuts).
Answer:
A unicellular organism is formed by a single cell. ... The circulation in unicellular organisms is carried out by the movement of the cytoplasm of the cell called cyclosis.