#Question id: 10671
#Section 1: Ecology
The principle of competitive exclusion states that
#Question id: 4645
#Section 2: Evolution
The treeʹs horizontal axis is a timeline that extends from 100,000 years ago to the present; the vertical axis represents nothing in particular. The labeled branch points on the tree (V—Z) represent various common ancestors. Letʹs say that only since 50,000 years ago has there been enough variation between the lineages depicted here to separate them into distinct species, and only the tips of the lineages on this tree represent distinct species.
Which of the five common ancestors, labeled V—Z, has given rise to the greatest number of species, both extant and extinct?
#Question id: 12295
#Section 1: Ecology
#Question id: 10645
#Section 1: Ecology
The logistic equation above is used to describe the rate of change of a population, N, with time, t, where r is the intrinsic rate of increase and K is the carrying capacity. dn/dt is isoclines when
#Question id: 10846
#Section 1: Ecology
Many birds readily feed upon periodic cicadas when they emerge as adults. This interaction between birds and cicadas represents an example of