Migration is going to have what kind of effect on the genetic variation between populations?
A. decrease variation
B. increase variation
C. will not affect variation
D. maintain variation
A
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The ________ model of population growth assumes that essential resources are unlimited and that the environment is constant
Fill in the blank(s) with correct word
Which of the following are two names for classes of hormones?
A) Lipophilic and lipotropic B) Protein and steroid C) Transcriptional and translational D) Ionotropic and metabotropic
A proficient engineer can easily design skeletal structures that are more functional than those currently found in the forelimbs of such diverse mammals as horses, whales, and bats. The actual forelimbs of these mammals do not seem to be optimally arranged because _____.
A) natural selection has not had sufficient time to create the optimal design in each case, but will do so given enough time B) in many cases, phenotype is determined by genotype and the environment C) though we may not consider the fit between the current skeletal arrangements and their functions excellent, we should not doubt that natural selection ultimately produces the best design D) natural selection is generally limited to modifying structures that were present in previous generations and in previous species
The process that makes an exact copy of a cell's DNA is called
A.) conservation B.) preservation C.) replication D.) synthesis