The nuclear lamina is
A) the sac that holds the genetic material.
B) part of the nucleus that holds RNA.
C) a fibrous layer that lines the inner face of the nuclear membrane.
D) the site of protein synthesis.
C) a fibrous layer that lines the inner face of the nuclear membrane.
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Isoelectric focusing separates proteins based on the pH at which they are electrically ________.
Fill in the blank(s) with the appropriate word(s).
What do the two daughter cells generated by the first asymmetric division of the plant zygote become?
A. the suspensor and the embryo B. the epicotyl and the hypocotyl C. the root and the shoot D. the egg and pollen E. the xylem and the phloem
Why don't the grafted hybrids produce apples with a blend of traits from the scion and the rootstock?
A) The rootstock suppresses activation of the scion genes, which alters fruit production. B) The rootstock is unable to perform photosynthesis and so can't produce fruit. C) Transplanted nuclei from scion cells regulate gene expression in the rootstock. D) The rootstock regulates gene expression in the scion but contributes no genetic information for fruit production.
Organisms that are resident microbiota are best described as
A) microorganisms that remain with the person throughout life. B) any microorganisms that cause disease. C) organisms that remain in the body for a short time. D) microorganisms that may cause a disease under certain circumstances. E) microorganisms that never cause disease.