One reason why African elephants are endangered is _____.
a. the low cost of hunting exhibitions
b. exploitation by zoo owners
c. many natural predators
d. governments often prohibit private ownership
Question 2
Thomas Malthus' prediction of mass starvation resulting from diminishing marginal returns has not been fulfilled because
A) the law of diminishing marginal returns did not hold in this case.
B) Malthus ignored other factors like technological change.
C) relative to Malthus' day, larger percentage of today's labor works in the agricultural sector.
D) All of the above.
The deer mouse and the African elephant represent extremes among mammals of r versus K selection.
Endocasts from South African australopithecines.
A spark plug thread chaser is a low-cost tool that hopefully will not be used often, but is ...
Cost of Going to School
The expected value for a binomial probability distribution is _____.