One group of fruit flies reproduces in August and one group reproduces in September. Which of the
following mechanisms is preventing them from cross breeding?
a. hybrid sterility
b. genetic isolation
c. sexual isolation
d. mechanical isolation
e. temporal isolation
E
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The movement of some molecules and ions out of excretory system tubules and back into body fluids
is
a. reabsorption. b. release. c. filtration. d. secretion. e. diffusion.
Four of the five answers listed below are functions of parenchymal tissue. Select the exception
a. conduct water b. wound healing c. food storage d. conduction of photosynthesis e. secretion
This figure compares an intertidal habitat before and after an oil spill. Which one of the following organisms appears to persist after the spill?
1.fish
2.mollusks
3.echinoderms
4.barnacles
Which of the following does not describe triglycerides?
A) They contain a 3-carbon glycerol backbone. B) They include three hydrocarbon chains. C) They are typically referred to as "fats" when solid at room temperature. D) They contain four fused carbon rings. E) They are composed primarily of carbon, hydrogen, and oxygen