Which one of the following is a selective advantage of simple multicellularity over singlecelled organisms?
A. Multicellularity helps organisms avoid
predation.
B. Mutlicellularity results in fundamental
changes in metabolic processes.
C. Multicellularity helps organisms utilize
more food sources.
D. Multicellularity helps organisms enhance
efficiency of reproduction.
A
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If the partial pressure of oxygen (pO2) in a man's blood plasma decreased below that in his red blood cells, what would be the result?
A. More oxygen would diffuse into his red blood cells and be transported throughout his body. B. Oxygen would diffuse out of his red blood cells, and less oxygen would be transported throughout his body. C. The concentration of oxygen would be the same in red blood cells and blood plasma.
Activated genes can be inactivated by reversing histone modification during a process called ____
a. chromatin remodeling b. histone remodeling c. chromatin interference d. interference remodeling e. histone interference
Reverse transcriptase inhibitors, such as AZT, can be used to target which virus?
A) herpes B) HIV C) influenza D) rabies
Why are human males much more likely than human females to inherit the recessive condition hemophilia (a failure of the blood to clot properly)?
A. the gene for hemophilia is carried on the Y chromosome B. the hemophilia gene is carried on an autosome C. the gene for hemophilia is sex-linked D. hemophilia is the wild type