A cytologist is examining a tissue under an electron microscope. He notices that the endoplasmic reticulum of each cell is extremely rough in appearance and he knows that the rough appearance is because of the ribosomes embedded there. He asks why there are so many ribosomes. You respond,
A. "This tissue exports lipids and is very involved with mRNA production."
B. "This tissue exports proteins to other areas of the body."
C. "This tissue exports various nucleic acids, hence the large number of ribosomes present on the endoplasmic reticulum in each of those cells."
B. "This tissue exports proteins to other areas of the body."
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When S. aureus infects the body, which cells will produce the antigen receptors that will recognize the polysaccharides in the cell wall of S. aureus?
a. B cells b. Macrophages c. Memory T cells d. T cells e. Mast cells
the --- of life arises from the adaptations of species to different habitats over long spans of time
Fill in the blank(s) with the appropriate word(s).
What is responsible for voluntary movement?
A) conscious thought and cardiac muscle B) conscious thought and striated muscle C) conscious thought and smooth muscle D) unconscious thought and smooth muscle
Figure 29.9
Use the accompanying figure to answer the following question.
?
Meiosis occurs in the following stage (s)
A. A B. B C. C D. D E. E