What is something cells cannot survive without?
Options:
- (A) gas
- (B) Air
- (C) O2
- (D) CO2
- (E) Ca
- (F) O3
- (G) Fe
- (H) He
--
Let's think first: Cells cannot survive without oxygen. And oxygen, O2, is the molecule to do it. Cells cannot survive without O2.... So the answer is [(C)]

Which of the following organisms would reproduce sexually and not asexually?
Options:
- (A) Flowers
- (B) plants
- (C) amoeba
- (D) bacteria
- (E) fungus
- (F) snail
- (G) fungi
- (H) insects
--
Let's think first: Mollusks reproduce sexually. Mollusks in the diorama include snails and clams. Snails reproduce sexually.... So the answer is [(F)]

Viral envelopes are sometimes made of fats and what?
Options:
- (A) cellulose
- (B) glucose
- (C) Energy.
- (D) protein
- (E) viral particles
- (F) Energy
- (G) food
- (H) bacteria
--
Let's think first: Some viruses have an envelope of phospholipids and proteins. Phospholipids are body fats, too. Some viruses have an envelope of fats and proteins.... So the answer is [(D)]