A plantlike protist is known as:
Fill in the blank(s) with the appropriate word(s).
Answer: algae
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Neurons that carry messages from the CNS to effectors are
(a) sensory. (b) motor. (c) interneurons. (d) both a and b.
Comparing the evolution of domesticated dogs to the evolution of wolves over the same time period illustrates what relationship between artificial and natural selection?
A. Artificial selection is more likely to produce maladaptive structures than natural selection. B. Artificial selection cannot produce changes as large as changes produced by natural selection. C. Artificial selection is reversible; natural selection is not. D. In artificial selection, the magnitude of the selection pressure can be varied; in natural selection, it cannot. E. Artificial selection is slower than natural selection.
A researcher inserted DNA fragments from an organism into plasmids and introduced the modified plasmids into bacterial cells. Which of the following methods would be an effective means of identifying which clones contain a specific gene of interest?
A) Sequence the DNA of the plasmids from each isolate. B) Use a microarray to detect a transcript of the gene. C) Isolate clones that still have the vector's genetic marker. D) Assay for activity of the gene product. E) Use a northern blot to detect the mRNA of the gene.
Why is phylogenetic inference a difficult and computationally intensive problem? What solution do evolutionary biologists use to address this problem?
What will be an ideal response?