Seedless vascular plants most likely evolved
directly from
a. bryophytes.
b. angiosperms.
c. ferns.
d. gymnosperms.
e. green algae
A
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Which of the following allows cells to recognize each other?
a. Glycolipids b. Protein channels c. Carbohydrates d. Cholesterol
Looking at your results of the Ames test using bacteriological agar medium plates lacking the amino acid histidine, you find that there are many colonies growing on the agar. How do you interpret this result?
A. The drug being tested has no inhibitory effect on the bacterium; therefore, it is not a good antibiotic to give for treatment of disease. B. The chemical being tested is mutagenic. C. The bacterium has turned its operon genes on, producing proteins necessary for growth. D. The bacterium does not have any plasmids, so it cannot grow on the medium.
In humans, the male is the homogametic sex
Indicate whether the statement is true or false
Peptide bonds form between the amino acids stabilize the _______ structure of a protein
Fill in the blank(s) with the appropriate word(s).