Fact 1: Viruses cannot reproduce by themselves. Fact 2: Viruses Viruses are the smallest agents of disease. Given the two facts above, the smallest agents of what cannot reproduce by themselves?

OPTIONS:
- Pesticides
- bacteria
- Allergies
- fungi
- animals
- dangerous
- ferns
- disease

Answer: disease

Fact 1: Earthworms are important deposit feeders that help form and enrich soil. Fact 2: Earthworms by Casey Earthworms are invertebrates. Given the two facts above, invertebrates can be what?

OPTIONS:
- people
- scarce resources
- vertebrates
- deposit feeders
- Catch prey
- major threat to health
- more abundant
- planets

Answer: deposit feeders

Fact 1: Natural disasters can cause animals to leave an environment. Fact 2: Life in a volcanic environment can nevertheless be treacherous for animals. Given the two facts above, what type of terrain has little wildlife? ?

OPTIONS:
- Woods
- Volcanic
- Flatland
- Winter
- dry and hot
- threatened
- Steppe
- lack

Answer: Volcanic

Fact 1: Astem is used to store water by some plants. Fact 2: Stems carry water and nutrients. Given the two facts above, what do stems hold in plants?

OPTIONS:
- oxygen
- coded genes
- nutrients
- roots
- support
- acid
- cellulose
- fibrous

Answer:
nutrients