What increases the productivity and stability of ecosystems?
Options:
- (A) Fully cooking the oysters
- (B) genetic uniformity
- (C) genetic diversity
- (D) extinction
- (E) agriculture
- (F) disease
- (G) Earth orbiting the Sun
- (H) recycling
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Let's think first: Biodiversity increases the productivity and stability of ecosystems. Biodiversity is basically genetic diversity. Genetic diversity increases the productivity and stability of ecosystems.... So the answer is [(C)]


What is absorbed from the blood when someone uses the hormone or a medicine containing insulin?
Options:
- (A) red blood cells
- (B) Energy
- (C) glucose
- (D) sodium
- (E) oxygen
- (F) heat
- (G) lmestone
- (H) Energy.
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Let's think first: Insulin is a hormone that helps cells absorb sugar from the blood. Blood Sugar Glucose is sugar. Insulin is a hormone that helps cells absorb glucose from the blood.... So the answer is [(C)]


Producers that are adapted to very dry environments are called what?
Options:
- (A) xerophytes
- (B) ragweed
- (C) mammals
- (D) dry plants
- (E) animals
- (F) cactus
- (G) alpacas
- (H) bacteria
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Let's think first: Plants that are adapted to very dry environments are called xerophytes. If the plant is green, it is a producer. Producers that are adapted to very dry environments are called xerophytes.... So the answer is [(A)]


When many muscles contract a little bit, simultaenous, it produces:
Options:
- (A) forces
- (B) heat
- (C) cold blooded
- (D) sweat
- (E) electrical energy
- (F) Energy
- (G) pain
- (H) thermal displacement
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Let's think first: Shivering occurs when many muscles contract a little bit all at once. Heat production is increased by shivering and non-shivering thermogenesis . Heat production is increased when many muscles contract a little bit, all at once.... So the answer is [(B)]


Why do tigers compete?
Options:
- (A) to get along with others
- (B) pressure differences.
- (C) to give territory to others
- (D) They can distract drivers
- (E) mate with females
- (F) a hemisphere is tilted away from the sun
- (G) to listen to the alpha male
- (H) to gain territory and mates
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Let's think first: Animals may compete for territory, water, food, or mates. Animals such as lions and tigers fight. Tigers may compete for territory, water, food, or mates.... So the answer is [(H)]


What do organisms cluster around, in the ocean floor?
Options:
- (A) cracks
- (B) chemicals
- (C) limestone
- (D) crust
- (E) headaches
- (F) Nutrients
- (G) horses
- (H) dogs
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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
Let's think first: Organisms cluster around hydrothermal vents in the ocean floor. Background Hot water vents form inside cracks in the ocean floor. Organisms cluster around cracks in the ocean floor.... So the answer is [(A)]