All of the following are model organisms, except
A) Saccharomyces cerevisiae.
B) Drosophila melanogaster.
C) Caenorhabditis elegans.
D) Arabidopsis thialana.
E) Homo sapiens.
Answer: E
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Hind leg bones in whales are an example of ____ structures
a. vestigial b. analogous c. homologous d. adaptive e. fossilized
You have been asked to design a synthetic DNA motif, able to bind transcriptional regulatory proteins. The location on this motif that you will design for protein binding is the
A. major groove of the DNA double helix. B. phosphate backbone of the DNA double helix. C. minor groove of the DNA double helix. D. available hydrogen bonds of bases in single-stranded DNA. E. sugar backbone of the DNA double helix.
Errors in meiosis can be one mechanism of evolution. A change in the number of chromosomes can lead to the production of new species. Some plant species may have originated from errors during cell division, which led to them having more than two sets of
chromosomes, a condition called polyploidy. Hypothesize what kind of error during meiosis might occur to cause a normally diploid plant to generate tetraploid offspring, in which the offspring have four sets of chromosomes. What will be an ideal response?
A snail in your garden and an oyster are quite different in appearance. What would be evidence to justify grouping them together?
A. Both use a radula for feeding. B. Both use siphons to obtain oxygen. C. Both have sensory antenna. D. Both have a mantle capable of secreting calcium carbonate.