(question). What are critical for erectile health?
Options:
- (A) fur and fat
- (B) Energy.
- (C) Energy
- (D) sweating
- (E) exercise
- (F) arteries
- (G) strength
- (H) a cuticle
(answer). Arteries generally carry oxygen-rich blood. Oxygen-rich blood is critical for erectile health. Arteries are critical for erectile health.
The answer is (F)

(question). What are not cells at all, so they are neither prokaryotes nor eukaryotes?
Options:
- (A) Something with a head, thorax, and abdomen
- (B) Microscopic organisms
- (C) The smallest agent of disease
- (D) Dead prehistoric beings
- (E) female sex cells
- (F) major threat to health
- (G) remains of prehistoric life
- (H) Something that smells like rotten eggs
(answer). Viruses are not cells at all, so they are neither prokaryotes nor eukaryotes. Viruses Viruses are the smallest agents of disease. The smallest agents of disease are not cells at all, so they are neither prokaryotes nor eukaryotes.
The answer is (C)

(question). The most advantageous type of reproduction can be chosen when generational what is used?
Options:
- (A) Plants growth
- (B) alternation
- (C) competition
- (D) Chemical energy
- (E) A computer
- (F) colors
- (G) Energy.
- (H) Energy
(answer). Alternation of generations allows for both asexual and sexual reproduction. Advantages and disadvantages of sexual as opposed to asexual means of reproduction. Alternation of generations allows for using the most advantageous type of reproduction.
The answer is (B)

(question). What are bacteria and algae that use sunlight to make food?
Options:
- (A) birds
- (B) carnivorous organisms
- (C) Transfers energy
- (D) competing for resources
- (E) planktonic plants
- (F) By wind and rain
- (G) fish
- (H) Chemical energy
(answer).
Phytoplankton are bacteria and algae that use sunlight to make food. Planktonic plants are called phytoplankton. Planktonic plants are bacteria and algae that use sunlight to make food.
The answer is (E)