Are humans the only organism with vestigial traits?
What would be an ideal response?
No. Many organisms have vestigial traits. For example, snake legs are a clue that snakes descended from lizards.
Cloaca region of a Boa constrictor with spurs (rudimentary hindlegs)
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Specialized cell surface proteins on the neck of Mycoplasma mobile allow for ________.
A. "rolling" motility B. "inchworm" motility C. flagellar motility D. gliding motility
In meiosis of oogenesis, how many mature eggs result?
a. one b. two c. three d. four e. five
RNA molecules differ from DNA molecules because only RNA
A. has ribose. B. does not have thymine. C. is typically one strand of nucleotides. D. has uracil. E. All of the choices are correct.
When the gene for rat growth hormone was injected
into mouse eggs, a. they were subsequently implanted unsuccessfully into female mice. b. a third of the offspring of the surrogate mothers grew much lager than their littermates. c. the rat gene integrated into the mouse DNA, but did not express itself. d. the rat gene failed to integrate into the mouse DNA. e. all of the offspring of the surrogate mothers grew much larger than their littermates.