question... What is one thing viruses do not cause?
Options:
- (A) disease
- (B) AIDS
- (C) illness
- (D) cancer
- (E) Ebola
- (F) fever
- (G) death
- (H) smallpox
answer... Populations of viruses do not grow through cell division because they are not cells. Cancer is unregulated cell division. Cancer is not caused by viruses.
The answer is (D)

question... What attracts bees to the flower?
Options:
- (A) seeds
- (B) orchids
- (C) other bees
- (D) butterflies
- (E) thorns
- (F) heat
- (G) petals
- (H) pollen
answer... Petals attract pollinators to the flower. Bees are effective pollinators. Petals attract bees to the flower.
The answer is (G)

question... Which animal has a backbone?
Options:
- (A) camels
- (B) snail
- (C) bats
- (D) cricket
- (E) a fish
- (F) bird
- (G) koalas
- (H) octopus
answer...
Birds are endothermic tetrapod vertebrates. Animals with backbones are called vertebrates. All birds have backbones.
The answer is (F)