White-breasted nuthatches and Downy woodpeckers both eat insects that hide in the furrows of bark in hardwood trees. The Downy woodpecker searches for insects by hunting from the bottom of the tree trunk to the top, whereas the white-breasted nuthatch searches from the top of the trunk down. These hunting behaviors best illustrate which of the following ecological concepts?
A) competitive exclusion
B) resource partitioning
C) character displacement
D) keystone species
E) bottom-up and top-down hypotheses
This white pine (Pinus strobus), towering above the canopy in Algonquin Provincial Park, is an examp
The sparse plasma (blue) and dust (white) in the tail of comet Hale–Bopp are being
Urinary tract infection. A UTI is characterized by fever, lumbar or abdominal pain, and pain or burn
Functions of white blood cells.
The three possible sequences of the white, yellow, and echinus genes