________ is the consumption of one living organism by another
Fill in the blank(s) with correct word
Predation
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Why aren't ferns commonly found in deserts?
A. Fern fronds are sensitive to UV light. B. Fern spores are unable to resist prolonged dry conditions. C. Ferns are non-vascular and cannot absorb water from deep within the soil. D. Fern pollen is spread by insects that do not occur in deserts.
The operation of a synapse
a. results from the passage of an electrical charge across the gap. b. involves a transmitter substance from vesicles in the presynaptic neuron that acts upon a receptor site in the postsynaptic neuron. c. occurs only between two nerves. d. is limited only by the action of acetylcholinesterase. e. requires neurotransmitter to pass directly through the plasma membrane of a postsynaptic nerve.
An atom that is negatively charged because it has accepted an electron is a(n):
A. isotope. B. isomer. C. ion. D. monomer.
The bark of a woody stem contains:
1.xylem
2.parenchyma
3.vascular cambium
4.phloem