A drug that inhibits the Y5 receptor has been shown to
a. have an effect on body weight in normal rats.
b. have an effect on body weight in obese rats.
c. have an effect on food intake in normal rats.
d. have an effect on food intake in obese rats.
e. have no effect on food intake or body weight in any rats.
E
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The table shows the distribution of traits (A-E) in six extant species (1-6). A "0" indicates the ancestral condition, while a "1" indicates the derived condition. Based on this data, which pair of species diverged most recently?
A. 1 and 4
B. 2 and 3
C. 2 and 4
D. 6 and 4
E. 6 and 5
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 cladistics?
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?
The phenomenon of chance events causing the allele frequencies in a population to change unpredictably is known as
____.
a. genetic drift b. gene flow c. deleterious mutations d. nonrandom mating e. natural selection
Sporocytes divide by meiosis to create spores. What is different between the microsporocyte and megasporocyte in angiosperms?
A. The ploidy of the spores produced. B. The number of surviving spores. C. Whether the spores develop into unicellular or multicellular gametophytes.
What compounds were used in Miller and Urey's experiment to simulate the atmosphere of early Earth?
A) Oxygen, ammonia, hydrogen, and methane B) Ammonia, hydrogen, and carbon dioxide C) Water, oxygen, ammonia, and methane D) Water, oxygen, hydrogen, and methane E) Water, ammonia, hydrogen, and methane