Which statement best explains why an understanding of life-history trade-offs is important when examining the fitness of an organism? A. Because individuals may not be producing the maximum number of offspring they possibly can in any particular breeding season. B. Because in any particular breeding season, individuals may need to produce fewer offspring to enhance their own survival. C. Because individuals need to live longer, so they will not produce the maximum number of offspring each season. D. Because when individuals need offspring, they can choose whether to reproduce or not.

Which hypothesis is plausible for the extinction of the dodo bird? Select all answers that apply. A. The food and other resources they required became scarce due to climate change. B. An asteroid crashed into the region where the birds lived and only affected their survival and not the other animals that lived there. C. Cannibalism within the species caused the population to decline. D. Each bird dove into the water even though it could not swim, which led to mass drownings. U E. Predators, including humans, hunted and killed the population to a point that it could not recover. red MacBook Air 80 F3 F1 DO0 F4 F2 F5 F7 % & %24 23

Members of some species will sound warning calls when they notice predators even though this increases the likelihood the predator will find the individual that provided the alarm. The evolution of such behaviors provides evidence for which hypothesis?   A. Evolution selects behaviors that increase the ability of individuals in a species to camouflage.   B. Evolution selects behaviors that increase the likelihood that individuals in a species will reproduce.   C. Evolution selects behaviors that increase the the likelihood that individuals in a species that share similar genes will survive and reproduce.   D. Evolution selects behaviors that increase the likelihood that individuals in a species that share similar genes will migrate.

Why is reproductive isolation insufficient to define a species? A. Reproductive isolation doesn't take outgroups into account. B. This definition overlooks artificial reproduction, such as in zoos. C. This definition excludes organisms that reproduce asexually. D. Reproductive isolation can be accomplished in a variety of ways.

It is believed that trichomes give an evolutionary advantage to plants when herbivory is high because the trichomes may be irritating to the animals that feed on these plants. In these situations, the selection  pressure would favor plants with more trichomes. The experiment described above mimics this condition. What type of selection is represented here? A. Stabilizing B. Disruptive C. Directional selection

Which sequence of events in human evolution is most widely accepted? A.   increase in brain size, tool-use, bipedalism, movement out of Africa B.   tool-use, bipedalism, increase in brain size, use of fire C.   bipedalism, increase in brain size, tool-use D.   tool-use, use of fire, increase in brain size E.   bipedalism, tool-use, increase in brain size How do we know that the footprints discovered by Mary Leakey’s team at the site of Laetoli are those of bipedal hominids?     A.   There is no evidence of a divergent big toe B.   The stride width and length were similar to modern humans C.   There is evidence of an arch D.   all of these E.   A and C only   Which of the following were the first to arrive to the Western Hemisphere? A.   Modern Homo sapiens B.   Archaic Homo sapiens C.   Homo erectus D.   Neanderthals

explain in a summary what is the subclinical concept

A new species is discovered in which males care for offspring after birth, and females leave the nest immediately. In this species, males are likely to   a. be promiscuous.   b. have lower parental investment.   c. have fewer offspring overall than females.   d. have more offspring overall than females.

In dioecious plants, males usually produce larger flowers that attract more pollinators than do females. This is an example of a. character displacement b. sexual selection through female choice c. sexual selection through male-male competition d. divergence in resource use e. a cost of reproduction

What is an example of evolutionary mismatch in modern day humans?    A. Evolutionary mismatch is not a real concept.   B. Fatty and sugary foods were disadvantageous for early humans to eat, and they are overly abundant in modern times and contribute to obesity in modern humans.    C. Fruits and vegetables were disadvantageous for early humans to eat, but they are healthy for modern humans.    D. Fatty and sugary foods were advantageous for early humans to eat, but they are overly abundant in modern times and contribute to obesity.