*Question*
Marine species live mainly in shallow coastal waters, and seahorses inhabit shallow coastal waters, especially seagrass beds, coral reefs and mangrove swamps. Given these facts, what kind of species are seahorses among the following options: - horse - seaweed - edible - marine - a fish - shellfish - strong - food
**Answer**
marine

*Question*
Mollusks are a major food source for other organisms, including humans, and many organisms are omnivores with variable diets. Given these facts, what are mollusks used for among the following options: - a herbivore diet - survival - a vegetarian diet - Converting waste. - Catch prey - an omnivore diet - an egg diet - animal transport
**Answer**
an omnivore diet

*Question*
Mutation creates new genetic variation in a gene pool, and fertilization increases genetic variation. Given these facts, the gene pool expands through fertilization and: among the following options: - offspring - agriculture - mutation - babies - seeds - zygotes - relocation - competition
**Answer**
mutation

*Question*
Exercise increases a body 's strength, and exercise increases muscle strength and flexibility. Given these facts, what increases a body's flexibility among the following options: - Limbs - sweating - exercise - flexible schedule - arteries - heat energy - flex spending - flex accounts
**Answer**
exercise