Who proposed that all animals and plants consist of cells that contain a nucleus?
a. Matthias Schleiden
b. Rudolf Virchow
c. Theodor Schwann
d. Anton van Leeuwenhoek
Ans: c. Theodor Schwann
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The loss of function of the ____ renders fish unable to school
a. vestibular apparatus b. statocyst c. lateral line d. eyes e. saccule
What genetic phenomenon might a 2:1 phenotypic ratio indicate?
A) additivity B) codominance C) complete dominance D) recessive epistasis E) recessive lethal
In the phalarope, or wadepiper bird, the male is unusual in playing the larger parenting role -- he performs all the egg incubation and chick care. What unusual behavior might you predict for the female of the species?
A. The female provides sperm to fertilize the male's eggs. B. The female is part of a large harem of females, under the domain of a single male. C. The females compete to mate with the males, who choose among them. D. The females have dull, brown coloring that keeps them well-camouflaged. 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 traditional roles of mate selection and parental investments? 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: 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?
Which of the following statements is true of non-homologous end joining (NHEJ)?
A) it is a double-strand repair pathway B) it is error-prone C) it is error-free D) it utilizes the sister chromatid as a template for repair E) both A and B