Q: Fact 1: Most invertebrates have a nervous system. Fact 2: Invertebrates Among the invertebrates, the largest number of species are insects. Given the two facts above, what do insects have? | OPTIONS:
- four limbs
- liver
- sensory neurons
- epidermis and dermis
- lizards
- spiders
- important habitats
- nervous system
A: nervous system

Q: Fact 1: Polyps usually reproduce asexually. Fact 2: Reefs are built by tiny organisms called polyps. Given the two facts above, what are built by organisms that usually reproduce asexually? | OPTIONS:
- legumes
- reefs
- Roads
- dams
- bridges
- bushes
- bacteria
- trees
A: reefs

Q: Fact 1: Agreenhouse is used to protect plants from the cold. Fact 2: Angiosperms are the flowering plants. Given the two facts above, what does a greenhouse protect flowers from? | OPTIONS:
- Injury
- sunlight
- Winter
- heat
- fire
- wind
- cold
- oxygen
A: cold

Q: Fact 1: Mollusks have a circulatory system with one or two hearts that pump blood. Fact 2: Clams, oysters and snails are familiar mollusks. Given the two facts above, have a circulatory system with one or two hearts? | OPTIONS:
- Birds
- alpacas
- elms
- Clams
- salmon
- animals
- toads
- complex
A: Clams