Mutations may arise by replication error, __________ activity, or exposure to environmental hazards. Fill in the blank(s) with the appropriate word(s)
ANS: transposable element PTS: 1 DIF: Moderate
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Heirloom plants are treasured for their flavorful produce and true-breeding progeny that allow gardeners to avoid repeatedly purchasing seed from agribusiness conglomerates. What special effort is required to save seed from heirloom biennials such as carrots?
A. Since carrots produce large roots, they do not devote many resources to seed development. The roots must be trimmed before collecting seed. B. Since carrots build up so much beta-carotene, they do not devote many resources to seed development. A yellow carrot variety will produce better seeds than a darker one. C. Since carrots are related to wild weeds, they are often cross-pollinated. The green top must be bagged to ensure self-pollination. D. Biennials do not produce seed until the second year of growth. Although carrot roots are normally harvested after one season, they must be allowed to grow another year for seed collection. 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 biennials? 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?
Four of the five conditions listed below are related to
diet. Select the exception. a. colon cancer b. kidney stones c. cardiovascular disorders d. obesity e. Alzheimer’s disease
A branching tree that represents the evolutionary relationships among a number of species is, in scientific terms, called a(n)
A. family tree. B. pedigree. C. androgeny. D. phylogenetic tree.
Genetically modifying human eggs and sperms may directly affect future generations.
a. true b. false