Which of the following organelles is not surrounded by a membrane?
a. chloroplast
b. nucleus
c. mitochondrion
d. lysosomes
e. ribosomes
Answer: e. ribosomes
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How many chromosomes are in a red blood cell taken from a normal person? ____________________ Fill in the blank(s) with the appropriate word(s)
From an evolutionary perspective, behavior can be viewed best as:
a. not subject to the normal evolutionary process because it involves a neurological system. b. a trait that can satisfy the three conditions required for evolution by natural selection. c. something that is too complex to arise through natural selection. d. Both b) and c) are correct. e. All of the above are correct.
Which of the following describes a difference between prokaryotes and archaea?
Prokaryotes have cell walls composed of peptidoglycan, whereas archaea do not. Archaea can live only in water, and prokaryotes can live anywhere. Prokaryotes lack nuclei, whereas archaea do not. Prokaryotes reproduce asexually, whereas archaea reproduce sexually.
To make information travel faster through your body, your neurons ________.
a. are very large b. are wrapped with myelin c. are made of gray matter d. all those