What disrupts the cycle between organisms and the atmosphere?
Options:
- (A) burning coal
- (B) Sulfur dioxide
- (C) replanting forests
- (D) solar system
- (E) Greenhouse gasses
- (F) chlorofluorocarbons
- (G) life cycle
- (H) deforestation
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Let's think first: Carbon cycles quickly between organisms and the atmosphere. Deforestation also disrupts the Carbon Cycle. Deforestation disrupts the cycle between organisms and the atmosphere.... So the answer is [(H)]


Changes in what are essential for evolution to occur.
Options:
- (A) color of leaves
- (B) genetic material
- (C) learned behavior
- (D) synthetic material
- (E) the body's largest organ
- (F) acquired characteristics
- (G) sensory neurons
- (H) Most plants
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Let's think first: Mutations are essential for evolution to occur. Mutations are changes in the genetic material. Changes in the genetic material are essential for evolution to occur.... So the answer is [(B)]


What does bone provide protection for in humans?
Options:
- (A) epidermal
- (B) during the day
- (C) fur and fat
- (D) health
- (E) layers of fat
- (F) staying warm
- (G) The heart.
- (H) When it's cold
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Let's think first: Bone provides protection for soft tissues and internal organs. For the heart is the chief organ of the body and rules it. Bone provides protection for the heart.... So the answer is [(G)]


What do many plants do to respond to the shorter days in fall?
Options:
- (A) go through a resting period
- (B) changing the phase
- (C) Release energy
- (D) Generating heat
- (E) produce more pollen
- (F) colder and wetter
- (G) grow taller
- (H) make more chlorophyll
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Let's think first: Many plants respond to the days growing shorter in the fall by going dormant. Plants can be divided at any time, although the dormant or rest period is best. Many plants respond to the days growing shorter in the fall by going through a rest period.... So the answer is [(A)]


What kind of plants produce pollen?
Options:
- (A) white
- (B) insects
- (C) seeds
- (D) haploid
- (E) bees
- (F) swea
- (G) grass
- (H) Conifers
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Let's think first: Pollen consists of tiny grains that are the male gametes of plants. Haploid plants produce gametes. Pollen comes from haploid plants.... So the answer is [(D)]


What fiber can be found only in warm-blooded animals?
Options:
- (A) teeth
- (B) birth marks
- (C) muscle
- (D) taste buds
- (E) hair
- (F) wool
- (G) sugar
- (H) fur
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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: Hair is a fiber that is found only in mammals. All mammals are warm-blooded. Hair is a fiber that is found only in warm-blooded animals.... So the answer is [(E)]