Most plants rely on bacteria to supply them with a usable form of which of the following substances?
A) nitrogen
B) carbon dioxide
C) water
D) amino acids
A
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If two males compete directly with one another over access to a group of females, this is a form of ____ (intra/inter) sexual selection?
Fill in the blank with the appropriate word.
The structures in this figure:a
provide anchorage points between adjacent cells.
b. allow the transport of small molecules and ions between adjacent cells.
c. allow passage of materials through intercellular spaces.
d. prevent the passage of materials through intercellular spaces.
e. can only be found in plants.c
Why have humans experienced cultural evolution, while other species of primates have not?
a. Humans have greater intelligence than other primates. b. Humans have a higher level of social organization. c. Humans live longer than other primates. d. Humans are unable to escape predators like other primates. e. Humans are physically stronger than most primates
Diagram the life cycle of a pine. What will be an ideal response?