Each archegonium produces many eggs
_____________________ Indicate whether the statement is true or false.
False - a single egg
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How might a change of one amino acid at a site, distant from the active site of an enzyme, alter an enzyme's substrate specificity?
A) by changing the enzyme's stability B) by changing the enzyme's location in the cell C) by changing the shape of an enzyme D) by changing the enzyme's pH optimum E) An amino acid change away from the active site cannot alter the enzyme's substrate specificity.
The primary RNA transcript in eukaryotes is
A. mRNA before the exons have been removed. B. tRNA before it forms its hairpin loops. C. mRNA after the introns have been removed. D. rRNA before it forms the ribosome. E. mRNA before the introns have been removed.
Marble bone disease is a disease in which bone increases in mass and becomes abnormally hard. This disorder is most likely caused by the inactivity of which part of the body?
A) bone marrow B) osteoblasts C) osteoclasts D) vertebrae
A group of an interbreeding natural population that is reproductively isolated from other such groups is called a
A) species. B) tribe. C) genotype. D) community. E) genus.