reproductive isolation
What will be an ideal response?
results in new species.
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Which statement about mutations is not true? (Choose all that apply)
A. Mutations make evolution possible. B. Mutations result in genetic variation among individuals. C. Mutations accumulate in a genome over time. D. Mutations are usually caused by exposure to radiation. E. Mutations can be harmful, beneficial or neutral. F. Mutations occur as a direct response to an organism's attempt to change one of its traits.
In studies of two species of barnacles in the marine intertidal zone it was observed that Chthamalus can live in the upper intertidal zone and the lower intertidal zone if Semibalanus is absent, and Semibalanus can only live in the lower zone because it is more subject to dehydration. Based on this, which of the following statements are true? Check all that apply.
_____ The realized niches of the two species differ. _____ The fundamental niche of Chthamalus is larger than its realized niche. _____ The fundamental niche of Chthamalus is larger than the fundamental niche of Semibalanus. _____ The fundamental and the realized niches of Chthamalus are the same. _____ The fundamental and the realized niches of Semibalanus are the same.
In human females, what does their urine passes through?
A. Clitoris B. Vagina C. Perineum D. Urethra
Which nucleic acid is a major part of ribosomes?
a. DNA b. rRNA c. mRNA d. tRNA e. RNA polymerase