35. in the study of ecosystems, predator-prey models are often used to study the interaction between species. consider popu- lations of tundra wolves, given by wstd, and caribou, given by cstd, in northern canada. the interaction has been modeled by the equations dc −ac2bcw dw −2cw1dcw dt dt (a) what values of dcydt and dwydt correspond to stable populations? (b) how would the statement “the caribou go extinct” be represented mathematically?

How does the fossil record provide evidence that the modern whale evolved from the anthracotheres? a) the modern whale looks like their ancestor the anthracotheres. b) the modern whale has all of the same structures as their ancestor. c) there is not enough evidence to suggest the the modern whale evolved from the anthracotheres. d) the anthracotheres has a structure that is still present in the modern whale, but is no longer of use to the modern whale.