q: What has a range of sexual reproductive systems? 
Options:
- (A) Computer systems.
- (B) Most plants
- (C) animals
- (D) Roundworms.
- (E) mammals
- (F) Art reproductions.
- (G) insects
- (H) Stuffed toy bears.
a: (D)... Explanation: Roundworms make up the phylum Nematoda. Within the Nematoda, a range of reproductive systems occur. A range of reproductive systems occur in roundworms. That's why the answer is (D).

q: What has a nervous system?
Options:
- (A) Nerve tonic
- (B) Jellyfish
- (C) Air
- (D) fur seals
- (E) Cardiovascular system
- (F) animals
- (G) chickens
- (H) elephants
a: (B)... Explanation: Most invertebrates have a nervous system. Jellyfish and insects are invertebrates. Jellyfish have a nervous system. That's why the answer is (B).

q: What has a life cycle that includes alterations of generations?
Options:
- (A) apple
- (B) trees
- (C) salmon
- (D) Spruce
- (E) insects
- (F) animals
- (G) Cane.
- (H) bees
a: (B)... Explanation: All plants have a characteristic life cycle that includes alternation of generations. Many of the plants are fruit trees. All trees have a characteristic life cycle that includes alternation of generations. That's why the answer is (B).

q: Where do fungi get their food?
Options:
- (A) swamp vegetation
- (B) decomposing dead organisms
- (C) decomposition
- (D) the environment
- (E) mushrooms
- (F) By wind and rain
- (G) spores
- (H) carbon dioxide
a:
(B)... Explanation: Fungi lack chlorophyll, so they cannot make food by photosynthesis as plants can. Fungi decompose dead plant and animal matter. Since fungi cannot make food by photosynthesis, they decompose dead organisms. That's why the answer is (B).