q: What can happen when menstruation stops occurring?
Options:
- (A) Localized damage
- (B) Dehydration
- (C) periods
- (D) diabetes
- (E) massive damage
- (F) hot flashes
- (G) Sulfur dioxide
- (H) epilepsy
a: (F)... Explanation: Menopause occurs when menstruation stops occurring, usually in middle adulthood. Hot flashes are the classic sign of menopause and peri-menopause. Hot flashes can occur when menstruation stops occurring. That's why the answer is (F).

q: How do male dogs mark their territory?
Options:
- (A) Chemical energy
- (B) Hot dog eating contest
- (C) Adequate signage
- (D) with their fur
- (E) Scent marker
- (F) heat produced
- (G) mate with females
- (H) Paint
a: (E)... Explanation: Male dogs use pheromones in urine to mark their territory. During Urination Dog's urine is used as a scent marker for other dogs. Male dogs mark their territory with a scent marker. That's why the answer is (E).

q: What forms in shallow tropical water?
Options:
- (A) ocean
- (B) romance
- (C) bushes
- (D) ferns
- (E) reefs
- (F) bamboo
- (G) fossils
- (H) snorkelling
a: (E)... Explanation: Corals form large colonies in shallow tropical water. Huge colonies of hard corals form coral reefs . Reefs form in shallow tropical water. That's why the answer is (E).

q: Lobsters have special structures for:
Options:
- (A) excretion
- (B) Cooking
- (C) produce light
- (D) staying warm
- (E) butter
- (F) Maine
- (G) layers of fat
- (H) tastiness
a:
(A)... Explanation: Some arthropods have special excretory structures. An ant and a lobster are both arthropods. Lobsters have special excretory structures. That's why the answer is (A).