The process of song learning by white-crowned sparrows is similar to the process of territory-holding by African

cichlid fishes because brain cells in both animals can change ____ in response to well-defined social stimuli.



a. only their biochemistry
b. only their structure
c. only their function
d. only their structure and function
e. their biochemistry, structure, and function


ANSWER: d

Biology & Microbiology

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A cell biologist examines a skin cell from a lizard during metaphase of mitosis and determines that 20 chromatids are present.  The role of meiosis in this species is to (Check all that apply)  

_____  Produce 4 daughter cells that are genetically different from each other. _____  Produce 4 daughter cells that are genetically different from the original parental cell. _____  Reduce the number of chromosomes per cell from 10 to 5. _____  Reduce the number of chromosomes per cell from 20 to 10. 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 know about meiosis? 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?

Biology & Microbiology

What happens to the population size when the birth rate is much larger than the death rate?

a. It remains at an equilibrium. b. It grows to K very quickly. c. It grows to K, but very slowly. d. The population declines.

Biology & Microbiology

Most triploid zygotes arise from

A. fertilization of a diploid egg by a normal haploid sperm. B. fertilization of a normal haploid egg by a diploid sperm. C. fertilization of a normal haploid egg by two sperm. D. nondisjunction during the zygote's first mitotic division. E. fusion of the zygote with an unfertilized egg.

Biology & Microbiology

Organic molecules _______.

a) always contain carbon and hydrogen b) always contain hydrogen c) always contain carbon d) are always food molecules e) are found only in organisms, hence their name

Biology & Microbiology