As temperatures continue to rise, the photosynthetic rate reaches a maximum related to
A) the temperature response of rubisco.
B) the thickness of the boundary layer.
C) soil temperature.
D) oxygen availability.
A
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The disaccharide in the accompanying figure is ____
a. lactose b. fructose c. maltose d. cellulose e. sucrose
In the diagram of a root tip shown above, the item labeled "1" is the
a. quiescent center. b. zone of cell division. c. zone of elongation. d. root cap. e. zone of maturation.
The difference between geographic isolation and habitat differentiation (isolation) is the _____
A) relative locations of two populations as speciation occurs B) speed (tempo) at which two populations undergo speciation C) amount of genetic variation that occurs among two gene pools as speciation occurs D) identity of the phylogenetic kingdom or domain in which these phenomena occur
Which of the following is an example of a mechanical barrier?
A) stomach acid B) mucus C) skin D) lysozyme E) antimicrobial peptides