Drosophila developmental mutants of ____ genes produce larvae with mirror image segments
a. gap
b. pair-rule
c. segmentation
d. paternal effect
e. segment polarity
e
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Heterotrophs need only a few more genes than autotrophs
Indicate whether the statement is true or false.
Thanks to a novel recessive mutation, a certain plant species has begun to invade colder Arctic regions outside of its normal range. However, this cold-tolerant mutation has not yet become fixed in the population. A second mutation arises that promotes self-pollination. Do you predict that the self-pollination allele will be selected for in the Arctic regions? Why or why not?
A. Yes. The self-pollinated plant is more likely to maintain the cold-tolerant mutation, and plants in the Arctic are unlikely to be visited by pollinators. B. No. Outcrossing is always beneficial, since it enhances genetic diversity. C. No. Plants that produce flowers must be cross-pollinated for proper seed development. D. Cannot make a prediction from the information given. It depends on whether the plant is normally insect-pollinated or wind-pollinated. 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 pollination? 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? 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?
Choose the phrase that best represents macroevolutionary change.
A. major episodes of extinction B. new forms of animals replacing older ones C. changes in allele frequency in a population D. darker skin after hours spent in a tanning booth
Name three reasons why inflammation can be protective and useful?
What will be an ideal response?