Aristotle developed one of the first taxonomical classification schemes
Indicate whether the statement is true or false
T
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What were the short-term responses of each population during the first 20 years following the removal of the prairie dogs? a. Prairie dogs remained absent, and the mesquite population level rose to dominate thecommunity landscape
b. Ferrets, hawks, forbs, and mice populations all reduced very quickly to zero or near zero. c. Grasses rose very quickly, but then began to fall. d. All of the above.
HIV targets ______________ cells for infection
A. the helper T cells D. the red blood cells B. the cytotoxic T cells E. more than one of these C. the B cells
Will treating a viral infection with antibiotics affect the course of the infection?
A) No; antibiotics work by inhibiting enzymes specific to bacteria. Antibiotics have no effect on eukaryotic or virally encoded enzymes. B) No; antibiotics do not kill viruses because viruses do not have DNA or RNA. C) Yes; antibiotics activate the immune system, and this decreases the severity of the infection. D) Yes; antibiotics can prevent viral entry into the cell by binding to host-receptor proteins.
Name the polyploid condition that is formed from the addition of an extra set of chromosomes identical to the normal diploid complement of the same species
A) autotetraploidy, assuming the normal chromosome complement is haploid B) alloeuploidy, assuming the normal chromosome complement is diploid C) autotetraploidy, assuming the normal chromosome complement is diploid D) allotetraploidy, assuming the normal chromosome complement is diploid E) autooctoploidyploidy, assuming the normal chromosome complement is haploid