Arabidopsis thaliana is a model organism for studying the molecular biology of
a. fruit flies.
b. fungi.
c. plants.
d. vertebrates.
Ans: c. plants.
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_____, which probably evolved from infoldings of the plasma membrane, first appear in the fossil record about 1.8
million years ago.
a. Eukaryotes b. Archaea
c. Plants d. Bacteria e. Photosynthesizers
Which statement about cholesterol is TRUE?
a. If the blood contains too much HDL, cholesterol may be deposited on the arterial wall. b. LDLs transport cholesterol from cells to the liver when cholesterol levels are high. c. LDLs must bind with an LDL receptor on the cell membrane to be taken up by cells. d. Most plasma cholesterol is transported on HDLs or high-density lipoproteins.
e. Omega-3 fatty acids are thought to decrease HDL levelsWithin the lungs of humans, gas exchange occurs across
A) alveoli. B) bronchioles. C) tracheae. D) bronchi.
An island is on the migration route of sea birds. This island also has abundant tree nesting birds that live on the island permanently and are not found on any other island. The tree nesting birds are more likely than the sea birds to be in Hardy-Weinberg equilibrium because:
A. the sea bird population is larger. B. there are fewer mutations in the sea birds. C. mating is random in the tree nesting birds. D. of high immigration in the sea bird population. E. natural selection is stronger in the tree nesting birds. Clarify Question · What is the key concept addressed by the question? · What type of thinking is required? · What key words does the question contain and what do they mean? Gather Content · What do you already know about the Hardy-Weinberg principle? How does it relate to the question? Consider Possibilities · What other information is related to the question? Which information is most useful? Choose Answer · Given what you now know, what information and/or problem solving approach is most likely to produce the correct answer? Reflect on Process · Did your problem-solving process lead you to the correct answer? If not, where did the process break down or lead you astray? How can you revise your approach to produce a more desirable result?