[Q] What do earthworms ingest in order to form and enrich soil?
Options:
- (A) segmented
- (B) vegetation
- (C) sediment
- (D) bacteria
- (E) Chlorophyll
- (F) sandworm
- (G) crawling
- (H) dirt
[A] Here's my solution: Earthworms are important deposit feeders that help form and enrich soil. Deposit feeders ingest sediment and then extract the food. Earthworms ingest sediment to then help form and enrich soil. The answer is (C).

[Q] Crustaceans and insects have what special structures?
Options:
- (A) the eyes
- (B) a cuticle
- (C) internal
- (D) excretory
- (E) invisible
- (F) Chlorophyll
- (G) fur and fat
- (H) muscled
[A] Here's my solution: Some arthropods have special excretory structures. Crustaceans are, like insects, arthropods. Crustaceans and insects have special excretory structures. The answer is (D).

[Q] What kind of animal sometimes gets hiccups?
Options:
- (A) mammals
- (B) fur seals
- (C) fish
- (D) goats
- (E) humans
- (F) insects
- (G) worms
- (H) dogs
[A] Here's my solution: Mammals breathe with the help of a diaphragm. Hiccups are a result of spasms of the diaphragm. Mammals sometimes get hiccups. The answer is (A).

[Q] Are there organisms simpler than cells.
Options:
- (A) DNA
- (B) plankton
- (C) tiny
- (D) algae
- (E) amoeba
- (F) RNA
- (G) yes
- (H) food
[A]
Here's my solution: Viruses are not cells. Viruses Viruses are the simplest organisms known. Cells are not the simplest organisms. The answer is (G).