According to the latest research, what statement best describes the first eukaryote?
a. It lacked a nucleus, a mitochondrion, or a chloroplast.
b. It lacked a nucleus, but contained a mitochondrion and a chloroplast.
c. It contained a nucleus and a chloroplast, but not a mitochondrion.
d. It contained a nucleus and a mitochondrion, but not a chloroplast.
e. It contained a nucleus, a mitochondrion, and a chloroplast.
ANSWER: d
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A. abnormal microbiota. B. transient microbiota. C. variant microbiota. D. normal microbiota.
What are examples of cells that support neurons both structurally and functionally?
A. dendrites and nodes of Ranvier B. neuroglia and nodes of Ranvier C. Schwann cells and dendrites D. dendrites, nodes of Ranvier, and neuroglia E. Schwann cells, oligodendrocytes, and other neuroglia
Which process of evolution does not change the total number of species?
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Some species of Anopheles mosquito live in brackish water, some in running fresh water, and others in stagnant water. What type of reproductive barrier is most obviously separating these different species?
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