Should be A. Species have changed over time.
Answer:
No, viruses are not considered cells as they're parasitic and can't live on their own. A virus has to infect living cells in order to survive, so it's not considered a cell.
Answer: Correct options are A, C and D
A. a forest because it has more trees to provide plant litter
C. a forest because it has more animals to mix the soil
D. a forest because the trees prevent rain from reaching the soil
Explanation:
Humus simply refers to organic matter, and the quantity of organic matter in a habitat depends on the extent of life activities done there.
Deserts, unlike forests have minimal life activities (as few plants and animals thrive in it). Thus, forests have more humus than deserts.
Answer:
A.
Explanation:
All living things (whether a plant or an animal) will have cells
