The organs of excretion in flatworms are
a. nephridia.
b. contractile vacuoles.
c. Malpighian tubules.
d. flame cells.
e. book lungs.
D
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Which of the following represents the proper order of events in embryonic development?
A. fertilization, gastrulation, neurulation, cleavage, organogenesis B. fertilization, cleavage, gastrulation, organogenesis, neurulation C. fertilization, cleavage, gastrulation, neurulation, organogenesis D. fertilization, gastrulation, cleavage, neurulation, organogenesis E. fertilization, gastrulation, cleavage, organogenesis, neurulation
Unlike single-celled organisms that have direct contact with their external environment, most cells in a multicellular
organisms do not have direct contract with their external environment. How do these cells acquire nutrients and eliminate wastes?
a. by active and passive transport between the basal lamina and the interstitial fluid b. by active and passive transport between the basal lamina and the plasma c. by active and passive transport between the intracellular fluid and the interstitial fluid d. by active and passive transport between the intracellular fluid and the plasma e. through gap junctions between the intracellular fluid and the plasma
ATP is composed of deoxyribose, adenine, and three phosphate groups.
Answer the following statement true (T) or false (F)
Which of the studies below provide evidence linking genes and behavior? (Check all that apply)
_____ Fruit flies that are mutant for the genes dunce or rutabaga have impaired learning. _____ Mice that are lacking either the ephrinB3 or the EphA4 gene cannot walk normally, but instead hop like a kangaroo. _____ Two lines of fruit flies were created by repeatedly selecting for high or low aggressive behavior. After multiple generations, the high line was reliably more aggressive than the low line. _____ Twin studies comparing monozygotic and dizygotic twins have found a high heritability for height, although environmental influences like nutrition also play a role. Clarify question: What is the key concept addressed by the question? What type of thinking is required? Gather Content: What do you already know about the genetics that underlies a behavior? What other information is related to the question? Choose Answer: Given what you now know, what information is most likely to produce the correct answer? Reflection 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?