The best explanation for the phenotypic differences between humans and chimps despite the great similarities in their gene-coding sequences is
A. the vast differences in exons between their genomes.
B. the vast differences in the introns between their genomes.
C. the "junk" DNA of humans contains important sequences not present in chimps.
D. differences in gene expression between species.
D. differences in gene expression between species.
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Stem cells that can differentiate into any type of tissue but cannot differentiate into a complete organism are ______________ cells
A. totipotent B. pluripotent C. unipotent D. None of the choices is correct.
Receptors on the plasma membrane do all the following except _______.
a. create changes in the interior of the cell b. interact with hormones c. interact with neurotransmitters d. act as transport proteins
Plasmodesmata are considered part of the
a. symplastic pathway. b. transmembrane and symplastic pathways. c. transmembrane pathway. d. apoplastic, transmembrane, and symplastic pathways. e. apoplastic pathway.
If an entire genome is fragmented and then a large number of pieces are sequenced, the approach is known as the ________ approach
Fill in the blank(s) with correct word