12 Suppose a fire burns through the beetles habitat, leaving the trees, soil, and some rocks
charred black for several years. Most of the beetles and their predators survive the fire and
continue to live in the habitat.
a. Identify which beetle phenotype or phenotypes will most likely be favored in the habitat
after the fire. Explain your answer.
b. Identify the type of natural selection (directional, stabilizing, or disruptive) that will most
likely act on the beetle population.
The type of natural selection you identified in part (b) will change the phenotype distribution
in the beetle population.
c. Using your knowledge of natural selection, explain how the change in phenotype
distribution will occur.

On a recent expedition to a remote region of northern canada, scientists uncovered skeletal remains from about 100,000 years ago. surprisingly, all the skeletal remains, which included many species from differing biological families and spanned about two thousand years, showed evidence of experiencing temperatures in excess of 1000 degrees fahrenheit (or 538 degrees celsius). which of the following, if true, best explains the apparent paradox between the cold environment and the evidence of the bones experiencing hot temperatures? (a) chemical changes that naturally occur during the process of decay in only one north canadian species produce the same evidence of the species' skeletons being exposed to hot temperatures as the expedition scientists found. (b) a little over 103,000 years ago, a large fire is known to have occurred in northern canada. (c) strong evidence exists that as early as 70,000 years ago, homo sapiens around the world relied heavily on fire to cook animals. (d) in the same expedition and in roughly the same layer of excavation, scientists found rudimentary wood cutting and hunting tools used by early humans.

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.

Differentiate renewable and nonrenewable resources