The amniotes differ from the amphibians in that they
a. have efficient kidneys.
b. have a waterproof skin.
c. have internal fertilization.
d. have a shelled amniotic egg.
e. include all of these.
Answer: e
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A) Ostreococcus B) Prochlorococcus C) Roseobacter D) Trichodesmium
The protein-coding region of a eukaryotic gene ____
a. can be amplified directly from the genome b. is obtained by producing a cDNA copy from the gene’s transcript c. contains introns, so an mRNA copy must be produced from the gene’s transcript d. contains exons that are removed by restriction enzymes, while the remaining introns are ligated together e. contains introns that are removed by restriction enzymes, while the remaining exons are ligated together
Why do early successional stages harbor many r-selected species?
a. they often require shade b. they are long-lived c. they are not damaged by disturbances d. they produce many small seeds that colonize open areas e. they grow slowly
The easiest method of preventing sea stars from moving is to
A. plug their madreporite. B. lay them on their arboreal side. C. squeeze the tube feet as they are extended from the body. D. cut off two of their arms. E. None of these actions would prevent a sea star from moving.