Speciation may be promoted within a complex tropic ecosystem due to increasing what?
a. habitat heterogeneity
b. habitat homogeneity
c. competition
d. predation
a. habitat heterogeneity
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Prokaryotes reproduce rapidly and this allows genetic variation to spread quickly through a population. Two processes can create new variations in prokaryotic populations. Select the choice with those two processes.
A. mutation and phage viral attack B. phage viral attack and genetic recombination C. genetic recombination and nondisjunction D. genetic recombination and mutation E. genetic recombination and rapid cell division
Molluscs with a tubular shell and sheath foot are:
a. scaphopods. b. gastropods. c. bivalves. d. cephalopods. e. nudibranchs.
Which one of the following was not an adaptation seen in the sharks (Chondrichthyes)?
A. Calcified cartilaginous skeleton B. Swim bladder C. Lateral line system D. Internal fertilization and internal development E. Teeth
The lower, S-shaped end of the large intestine:
What will be an ideal response?