Frederic griffith discovered transformation in his experiments on mice and pneumococcus bacteria. he injected the mice with combinations of harmless, r-strain bacteria and disease-causing s-strain bacteria. which combination of bacteria killed the mice and showed that transformation occurred? a. heat-killed r-strain and live s-strain b. heat-killed s-strain and live r-strain c. heat-killed bacteria of both strains d. live bacteria of both strains

What adaptations can prey use to avoid predation

Aheterozygous normal male marries a woman with a sickle cell anemia. give the genotypes and possible phenotypes of the offspring

8) animals respond in various ways to stimuli detected through their senses. some of these responses are stimulated by the presence of danger. which of these animal responses is the best example of a response to an immediate threat? a) a rooster crows every morning at the first sign of light. b) as something approaches an octopus, it shoots a cloud of ink. c) from late fall until spring, bears hibernate to preserve energy. d) a dog is getting hot in the sunlight, so he moves to a shaded area.