question: 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.
answer: Roundworms make up the phylum Nematoda. Within the Nematoda, a range of reproductive systems occur. A range of reproductive systems occur in roundworms.
The answer is (D)

question: What is the last stage of aerobic transportation?
Options:
- (A) formation of acetyl coenzyme A
- (B) Glycolysis
- (C) electron transport
- (D) Dehydration
- (E) citric acid cycle
- (F) flow of electrons
- (G) recovery time from fatigue
- (H) weight-lifting
answer: Electron transport is the final stage of aerobic respiration. Last, the final project is due. Electron transport in the last stage of aerobic respiration.
The answer is (C)

question: Neurons are the structural and functional units of where what is critical?
Options:
- (A) organs
- (B) Glial cells
- (C) nerves
- (D) Structural units
- (E) voltage
- (F) Storage units
- (G) Critical care
- (H) A computer
answer: Neurons are the structural and functional units of the nervous system. Glial cells perform critical functions in the nervous system. Neurons are the structural and functional units of where the glial cells perform critical functions.
The answer is (B)

question: Plants shed their leaves in what season each year?
Options:
- (A) spring season
- (B) wet season
- (C) firing season
- (D) Summer
- (E) When it's cold
- (F) colder weather
- (G) Winter
- (H) dry season
answer:
Plants that shed their leaves seasonally each year are called deciduous plants. Trees here are largely deciduous, shedding their leaves in the dry season. Plants shed their leaves in the dry season each year.
The answer is (H)