Members of a virus family have the same type of nucleic acid.
Answer the following statement true (T) or false (F)
True
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Which of the following statements best supports the claim that natural selection has favored genes that underpin a species-specific behavior?
A. An individual avoids certain locations or substances associated with negative experiences. B. A male responds to a female-produced pheromone. C. Humans acquire a specific language. D. Threatening silhouettes provoke defensive, crouching postures in chicks.
The forward thrust of swimming stingrays is created by:
a. the pectoral fins. b. the pelvic fins. c. the dorsal fin. d. the caudal fin. e. the anal fin.
Scientists have begun to manipulate genes in microbes, plants, and animals for practical applications. What is this cutting-edge technology called?
immunology taxonomy genealogy genetic engineering
Silicon is an element that, like carbon, has four vacancies in its outer electron shell and therefore has the same bonding chemistry as carbon. Silicon is not found to any significant degree in the molecules found in living systems, however
Does this difference arise because elemental carbon is more abundant than silicon? What other explanations are there for the preferential selection of carbon over silicon as the basis for the molecules of life?