What conclusion can be drawn from Gause's experiments on interspecific competition in Paramecium?
a. Both populations of Paramecium expire due to a build-up of waste products.
b. One population of Paramecium used the other as a food source.
c. Paramecium populations survive well together because they have no limiting resources.
d. When two populations of Paramecium use the same limiting resource, they can coexist
long term.
e. When two populations of Paramecium use the same limiting resource, they cannot coexist
long term.
E
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What is the net movement of substances to regions of lower concentration called?
A. Osmosis B. Active transport C. Facilitation D. Diffusion
In comparing mitosis and meiosis, which of the
following statements is true? a. Meiosis I is more like mitosis than is meiosis II. b. Both processes result in four cells. c. Pairing of homologues occurs in both. d. Chromatids are present only in mitosis. e. Meiosis II resembles mitosis
The basic unit of contraction in a muscle is the
a. myofibril. b. sarcomere. c. sliding filament. d. contractile vacuole. e. Z band.
The first phase of aerobic cellular respiration is:
A. the citric acid cycle. B. glycolysis. C. the electron transport system. D. fermentation. E. the preparatory reaction.