The structure(s) that easily distinguishes a plant cell from an animal cell is/are
_____ chloroplasts.
_____ nucleus.
_____ cell wall.
_____ the Golgi apparatus.
__X__ chloroplasts.
_____ nucleus.
__X__ cell wall.
_____ the Golgi apparatus.
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The vessels that carry blood away from the heart in a closed circulatory system are referred to as
A. arteries. B. veins. C. capillaries. D. sinuses. E. auxiliary hearts.
The food for your dog is kept in the refrigerator, and any time you open the door, the dog comes. This is an example of
A. association. B. learned behavior. C. conditioning. D. All of these answers are true.
A virus is composed of each of the following except:
A) capsid B) proteins C) DNA or RNA D) ribosomes
Which of the following is a function of reverse transcriptase?
A. It functions as a ribonuclease to degrade the viral RNA once it has been copied into DNA B. It functions as a DNA-dependent DNA polymerase C. It functions as a RNA-dependent DNA polymerase D. All of these are functions of reverse transcriptase.