Observation of tool-making among chimpanzees was revolutionary primarily because scientists believed a. chimpanzees lacked the dexterity to make tools b. tool use was a defining characteristic of humans c. tool-making was a defining characteristic of humans d. none of the above select the best answer from the choices provided a b c d

4.06 hc)a five-year review of threats to the southern resident orca population of the united states concluded that the top threats were prey availability, contaminants, and effects from recreational and whale watching vessels. further down the list are oil spills, disease, and effects from commercial vessels not targeting whales. how might this list be different if it were for transient whale populations, which have a larger average population size and live farther offshore in open waters? a)the transient population is more likely to be affected by contaminants. b)the transient population is less likely to be affected by whale watching vessels. c)the transient population is more likely to be affected by disease. d)the transient population is less likely to be affected by prey availability.

The probability of producing a normal child by two parents who are carriers for an autosomal recessive disorder is

Which measure of an earthquake depends on how close you are to the focus?