Which process is most directly associated with the theory of evolution?
a. Populations changing over time
b. Mutations changing the gene pool
c. Production of large numbers of offspring
d. Sexual reproduction producing variation in a population
e. Competition between members of a population for limited resources
a
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All of the following statements are true about squid EXCEPT
A. digestion occurs in the stomach and a cecum. B. squid are continuous feeders. C. the mouth has jaws that bite off pieces of prey with the help of a toothy radula. D. the squid's tentacles seize its prey. E. squids are molluscs.
Diatoms have a special problem
A. because they must await a chemical signal from a fish before they can become mobile and search for mating partners B. because their heavy siliceous shells impede conjugation C. because their + and - mating strains are nonmotile and have to be dispersed by currents D. because their two halves fit like the lid and body of a pillbox and on repeated cell divisions the half that is overlapped gets progressively smaller E. because the gametes experience difficulty in exiting the overlapping halves of their siliceous shells