Both primary and secondary growth are accomplished by mitotic cell division. Compare and contrast these two types of growth
What will be an ideal response?
Primary growth involves apical meristem cells and occurs in the growing tips of roots and shoots. Differentiation following division is responsible for specialized plant structures. Secondary growth occurs by the division of lateral meristem cells and causes stems and roots to become thicker and woodier.
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The tRNA shown in the figure above has its end projecting beyond its end. What will occur at this end?
A) The codon and anticodon complement one another. B) The amino acid binds covalently. C) The excess nucleotides (ACCA) will be cleaved off at the ribosome. D) The small and large subunits of the ribosome will attach to it. E) The cap of the mRNA will become covalently bound.
Which is a benefit of sexual reproduction over asexual reproduction?
a. More offspring can be produced. b. The offspring are all identical to the parents. c. There is less variation from generation to generation. d. Evolution will occur at a slower rate when there are two parents. e. The interaction of the genes from both parents brings about genetic variatio
The job of the placenta is primarily associated with
A. nourishment and waste removal. B. separation of the layers of embryonic tissue. C. protection of the fetus from infection. D. development of the outermost tissue of the embryo.
Acoustical communication includes all of the following EXCEPT:
a. alarm calls. b. cricket chirps. c. honey bee waggle dance. d. bird song. e. territorial howling of wolves.