[Q] What size are cells?
Options:
- (A) either huge or tiny
- (B) non existent
- (C) dense
- (D) large
- (E) white
- (F) tiny
- (G) dead
- (H) albino
[A] Here's my solution: Cells vary in size as well as shape, but all cells are very small. Atoms are tiny particles that are too small to see. Cells vary in size as well as shape, but all cells are very tiny. The answer is (F).

[Q] Plants can be infected by what?
Options:
- (A) human pathogens
- (B) infected meat
- (C) Pesticides
- (D) insects
- (E) human papillomavirus
- (F) viruses
- (G) fungi
- (H) bacteria
[A] Here's my solution: Viruses infect and live inside the cells of living organisms. Plants are complex living organisms. Viruses infect and live inside the cells of plants. The answer is (F).

[Q] What use energy and minerals to make food?
Options:
- (A) trees
- (B) plant life
- (C) humans
- (D) producers
- (E) bears
- (F) elephants
- (G) Most plants
- (H) ferns
[A] Here's my solution: Producers use energy and inorganic molecules to make food. Minerals are inorganic substances. Producers use energy and minerals to make food. The answer is (D).

[Q] What can be found in moist soil near rivers and streams in tropical regions?
Options:
- (A) storing water
- (B) a fish
- (C) insects
- (D) Most plants
- (E) shrub beds
- (F) bioaerosols
- (G) ferns
- (H) reptilians
[A]
Here's my solution: Caecilians can be found in moist soil near rivers and streams in tropical regions. Salamanders, frogs, toads, caecilians Class Reptilia. Reptilians can be found in moist soil near rivers and streams in tropical regions. The answer is (H).