(question). What occurs when muscles contract and propel male gametes?
Options:
- (A) fertilization
- (B) sex
- (C) ejaculation
- (D) electrically
- (E) rapid expansion
- (F) motion
- (G) competition
- (H) intercourse
(answer). Ejaculation occurs when muscle contractions propel sperm from the epididymes. Male gametes are called sperm. Ejaculation occurs when muscle contractions propel male gametes.
The answer is (C)


(question). Emphysema is often cause by exposure to:
Options:
- (A) high temperature
- (B) fog
- (C) Greenhouse gasses
- (D) rays or beams
- (E) hot steam
- (F) tobacco smoke
- (G) Pollution
- (H) incendiary people
(answer). Lung cancer is most often caused by exposure to tobacco smoke. Many patients with lung cancer also have emphysema. Enphysema is often caused by exposure to tobacco smoke.
The answer is (F)


(question). Creatures with six legs may live in what?
Options:
- (A) space centers
- (B) ocean water
- (C) salt and water.
- (D) large colonies
- (E) small pendants
- (F) loose soil
- (G) distant moons
- (H) body water
(answer). Insects may live in large colonies and have complex social behaviors. Insects have six legs. Creatures with six legs may live in large colonies.
The answer is (D)


(question). What can hiv infect and destroy part of?
Options:
- (A) water
- (B) parasitic
- (C) epidermis and dermis
- (D) the immune response
- (E) Veins and arteries.
- (F) Most plants
- (G) the body's largest organ
- (H) Trojan worm
(answer).

Show your work and conclude with the exact phrasing "Therefore, the final answer is [answer]." where [answer] is just the final number or expression that solves the problem.
user
HIV infects and destroys helper T cells. Helper T Cells Helper T cells are the brains behind immune response. HIV infects and destroys part of the immune response.
The answer is (D)