You walk down into your basement to find that the carpeting on the floor is damp. Concerned, you look around for large puddles of water or broken pipes, but find none. In fact, only the basement floor and carpeting is damp. You realize that water must have wicked into the carpet from the floor by ________.
A. adhesion and solubility
B. adhesion, cohesion, and solubility
C. cohesion and solubility
D. adhesion and cohesion
Answer: D
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New World monkeys evolved approximately 30 million years ago. These animals are easy to identify because they
A. have opposable thumbs and binocular vision. B. have prehensile tails and hair. C. have protruding noses and prehensile tails. D. have flattened noses and prehensile tails. E. have opposable thumbs and protruding noses.
Fruit flies all look more or less alike. If you have a male and female fruit fly, how could you test the hypothesis that they're the same species?
A) Determine the sequence of several of their genes. B) Examine them closely under a microscope, and compare what you see to a published description of fruit flies. C) See if they'll mate when they're put together. D) See if they mate and if their offspring can also mate.
Which one of the following can create new alleles?
A) natural selection B) sexual reproduction C) mutation D) genetic drift
The physical characteristics an organism possesses that are used to describe, classify, and categorize the organism by appearance are referred to as its_________.
A) phenotype B) genotype