In a ecosystem, what does a producer produce
that flows through the ecosystem?
a. carbohydrates
b. minerals
c. water
d. carbohydrates and minerals
e. minerals and water
A
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The glycocalyx of a eukaryotic cell is
A. a protective mechanism against osmotic lysis. B. mostly polysaccharides. C. also called the cell wall. D. the site where many metabolic reactions occur. E. composed of many diverse proteins.
Tall corn plants (T) are dominant to dwarf plants (tt). Solid green leaves (G) are dominant to leaves with a white tip (gg). A cross between two corn plants yielded the following phenotypes: 51 tall plants with a white tip on their leaves; 43 dwarf plants with solid leaves; 48 dwarf plants with white tips on their leaves; 45 tall plants with solid leaves. What are the genotypes of the parents
that produced these plants? a. TtGg x TtGg b. TtGg x Ttgg c. ttGG x TTgg d. TtGg x ttgg e. None of the above
Four of the five answers listed below are characteristics of most veins. Select the exception
a. blood volume reservoir b. contain valves c. low resistance-transport tubes d. transport oxygen e. low blood pressure
Importing high concentrations of compatible solutes is a strategy cells use to counteract the effects of an environment containing a
a. high salt concentration. b. high dissolved-oxygen concentration. c. high water potential. d. low ionic concentration.