What kind of population spacing would you expect for a species that is strongly territorial?
A. uniform
B. clumped
C. random
D. uniform or clumped depending on whether it is a source or sink metapopulation
E. uniform or clumped depending on the life history strategy of the species
A. uniform
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Almost all the large mammals disappeared from North America by about 10,000 years ago.
A. hotspot B. habitat loss C. edge effects D. megafaunal extinction E. extinction vortex
Self-incompatibility in flowering plants is a biochemical recognition and rejection process that
a. prevents both self-fertilization and self-pollination. b. prevents self-pollination and occasionally prevents self-fertilization. c. prevents self-fertilization but not self-pollination. d. prevents self-pollination but not self-fertilization. e. prevents self-fertilization and occasionally prevents self-pollination.
For a given element, all atoms of that element
have the same number of
a. neutrons. b. electrons. c. protons. d. protons and neutrons. e. ions
The plasma membrane serves many functions, many of which depend on the presence of specialized membrane proteins. Which of the following roles of the plasma membrane could still occur if the bilayer were lacking these proteins?
(a) intercellular communication (b) selective permeability (c) cellular movement (d) import/export of molecules