Which of the following is(are) true about a zebrafish that glows in the dark because its DNA
contains and expresses the firefly gene for bioluminescence?
a. It is a transgenic organism.
b. It has been genetically engineered.
c. Its DNA profile has been determined.
d. It is a transgenic organism, and it has been genetically engineered.
D
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A molecule that stimulates an immune system reaction by B cells and T cells is termed a(n)
A. antibody. B. antigen. C. substrate. D. phagocyte. E. complement protein.
Sociobiologists emphasized that _____ are in born, genetic factors in motivation.
Fill in the blank(s) with the appropriate word(s).
To cross-fertilize flowers A and B, one would first remove flower A's immature ________ and later transfer pollen from flower B to flower A's ________
A) carpe; ovule B) anthers; stamen C) stamens; stigma D) stigma; style
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 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. B. Since carrots produce large roots, they do not devote many resources to seed development. The roots must be trimmed before collecting seed. C. 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. D. Since carrots are related to wild weeds, they are often cross-pollinated. The green top must be bagged to ensure self-pollination.