What essential difference between the growth and reproductive strategies of prokaryotes and multicellular eukaryotes explains why the latter have far more sophisticated regulatory mechanisms?
What will be an ideal response?
An important point made in this chapter is that while prokaryotes grow and divide, multicellular eukaryotes develop and differentiate. Tissue differentiation and the homeostatic maintenance of the multicellular body require a diversity of flexible, precise regulatory mechanisms.
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Mature siRNA annealed to its target usually leads to translational repression when:
A. the target mRNA is lacking its 5' cap. B. the siRNA is only partially complementary to the target. C. the target does not contain an Argonaute binding site. D. the siRNA is perfectly complementary to the target.
Which of the following statement best describes the defining characteristics of members of the Class Testudines?
A. They lack teeth. B. They have a hard shell. C. They have a kinetic skull. D. They have both a hard shell and are lacking in teeth. E. They have both a kinetic skull and a hard shell.
Plants transport water to their leaves through the xylem when water evaporates from the leaves. The evaporating water pulls other water molecules up the xylem through ____ .
A. Hydrophobic interactions B. Ionic bonds C. Covalent bonds D. Hydrogen bonds
Which of the following was something that Charles Darwin did NOT study during his long career?
a. the classification of barnacles b. the pollination of orchids c. the response of plants to light d. the genetic basis of traits e. insectivorous plants