The foraging gene of fruit flies encodes an enzyme involved in:
a. the digestion of yeast
b. the ability to smell food
c. producing saliva
d. learning about olfactory cues
e. digesting fruit
d
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If a germ-line cell from an owl contains 8 picograms of DNA during G1 of interphase, how many picograms of DNA would be present in each cell during prophase I of meiosis? (Enter the number only, not the units.)
What will be an ideal response? 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?
Assume that the molar percentage of thymine in a double-stranded DNA is 20. What are the percentages of the four bases (G, C, T, A)? If the DNA is single-stranded, would you change your answer?
What will be an ideal response?
Which of the following statements concerning the development of a coelom is FALSE?
a. It requires animals to have either two or three tissue layers. b. It requires the endoderm to be covered by mesoderm. c. It occurs in protostomes and deuterostomes. d. It may occur by schizocoely. e. It is a fluid-filled cavity.
What two main factors are responsible for the asymmetry in the coevolutionary arms race between microbial pathogens and their multicellular hosts?
What will be an ideal response?