What is microscope resolving power?
a. the ability to distinguish between internal structures and external structures of cells
b. the magnification of the highest power objective lens on the microscope
c. the ability to distinguish two adjacent structures as separate
d. the magnification of the lowest power objective lens on the microscope
c. the ability to distinguish two adjacent structures as separate
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A chromosome with the centromere located two-thirds of the distance from its end could be classified as
A. metacentric. B. submetacentric. C. acrocentric. D. telocentric. E. either submetacentric or acrocentric.
The first enzyme in glycolysis is hexokinase. What does it do?
a. Hexokinase facilitates diffusion of glucose through the cell membrane. b. Hexokinase moves glucose into the mitochondria to initiate glycolysis. c. Hexokinase catalyzes the phosphorylation of glucose to produce glucose-6-phosphate. d. Hexokinase destabilizes fructose-1,6-biphosphate to prepare it for cleavage.
Which protists have both plant and animal features?
a. Paramecium b. Trychonympha c. Trichomonas d. Euglena
DDT is an insecticide that kills a large spectrum of insects and causes the breakdown of reproductive fitness in birds. DDT accumulates in the food chain. Which of the four feeding guilds of birds has the highest proba-bility of extinction?
a. low in food chain and insectivore c. frugivore b. high in food chain and insectivore d. nectarivore