During differentiation, organs develop with different numbers of cells because
a. the cell adhesion molecules are present in some tissues.
b. the cells migrate.
c. the formation of myosin begins.
d. the length of interphase varies.
e. the microtubules rearrange.
D
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The majority of DNA in a human can be described as
A. composed of short interspersed elements. B. non-coding. C. simple sequence repeats. D. segmental duplications. E. structural.
Monocots demonstrate which of the following characteristics? Select all correct choices
A. vascular bundles located around the outer circumference of the stem B. a vascular cambium that produces secondary xylem C. new roots that consistently form at the bases of stems D. nodes giving rise to single leaves
The diarrhea that is a symptom of diseases like cholera is due to problems in the function of the
A. stomach. B. small intestine. C. large intestine. D. appendix. E. gall bladder.
Which of these is the smallest structure?
A. Dipeptide B. Protein C. Polypeptide D. Amino acid