Which factor does NOT influence the size a population reaches through natural increase?
A) Number of births
B) Distance traveled by migrants
C) Frequency of reproduction
D) Age of females at reproduction
E) Number of deaths
B
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The substance H2O is considered to be
a. both a molecule and a compound. b. a compound but not a molecule. c. neither a molecule nor a compound. d. a molecule but not a compound. e. a chemical but not biological molecule.
Neurotransmitters are removed from the
synaptic cleft by
a. diffusion. b. enzymatic degradation. c. active pumping back into the neuron. d. all of these. e. b and c only
The ________ is the organelle that fuses with endosomes and supplies hydrolytic enzymes necessary for the digestion of the materials
Fill in the blank with correct word.
Archaea differ from bacteria because archaea
a. lack peptidoglycan b. lack nuclei c. reproduce by binary fission d. use organic compounds for food