Gene expression in multicelled eukaryotic cells changes in response to _____
a. conditions outside the cell
b. master gene products
c. operons
d. conditions outside the cell and master gene products
D
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Refer to the figure above. What is the function of the AGU on the loop of the tRNA?
A) It attaches to the amino acid. B) It base pairs with a codon of mRNA. C) It stabilizes the tRNA-amino acid complex. D) It is the active site of this ribozyme.
Davis, Weintraub, and Lasser found three genes that are involved in muscle differentiation by
A. eliminating all the gene candidates that were expressed in both muscle and nonmuscle cells. B. finding all the genes that were expressed in common between two different muscle cell lines. C. cloning all the genes that were expressed only in muscle cell lines to determine if any of these genes could cause non-muscle cells to differentiate into muscle cells. D. mutating genes expressed only in muscle cells to see if differentiation could be prevented.
Which phase comes immediately after gastrulation?
a. fertilization b. organ formation c. cleavage d. gamete formation e. tissue specialization
The ________ niche is the portion of a fundamental niche in which species can exploit as a result of interactions with other species
Fill in the blank(s) with correct word