Mitosis can be used
1.for growth of a multicellular organism.
2.for asexual reproduction.
3.for gamete formation.
4.to produce haploid cells from diploid cells.
5.both for growth in multicellular organisms and for asexual reproduction.
5
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The observation that island D. yakuba are more closely related to mainland D. yakuba than island D. yakuba are to D. santomea is best explained by proposing that D. santomea _____
A) descended from a now-extinct, non-African fruit fly B) arrived on the island before D. yakuba C) descended from a single colony of D. yakuba, which had been introduced from elsewhere, with no subsequent colonization events D) descended from an original colony of D. yakuba, of which there are no surviving members. The current island D. yakuba represent a second colonization event from elsewhere.
3 types of structural classifications
What will be an ideal response?
The 3? end of eukaryotic pre-mRNAs are changed by:
a. removing the last phosphate group. b. adding a "cap." c. copying the last few bases so that it can form a duplex structure. d. adding 100?250 adenine nucleotides. e. phosphorylation of the mRNA molecule
______________ is a thick fluid inside the chloroplast membrane. Suspended within it are disk-like membranous sacs known as _______________, which are concentrated in stacks called _______________.
a) The stroma, grana, phloem b) The stroma, grana, xylem c) The stroma, thylakoids, xylem d) The stroma, thylakoids, grana e) The stroma, thylakoids, phloem