If you were presented with a tissue sample that contained long rows of cells surrounded by parallel
bundles of collagen and elastin fibers, that tissue would most likely be
a. bone tissue.
b. fibrous connective tissue.
c. cartilage.
d. blood.
e. adipose tissue.
B
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Cells change the composition of their plasma membranes as a response to changing environments. In general, colder temperatures reduce the fluidity of the membrane, so cells will produce different molecules to bring the fluidity back to normal
How would the cell change the membrane in response to colder temperatures? A. increase the amount of saturated triacylglycerols B. increase the amount of unsaturated fatty acids C. increase the length of the fatty acid side chains in the phospholipids
In all vertebrates with four-chambered hearts, the ________ receives oxygenated blood directly from the ________.
A. left ventricle, left atrium B. left ventricle, lungs C. right ventricle, right atrium D. right ventricle, lungs E. left atrium, left ventricle
Plant cells have a ridged cell wall. How do plant cells expand, and how important is cell expansion to plant growth?
What will be an ideal response?
Most epidermal cells are ___
a. melanocytes b. keratinocytes c. collagenocytes d. phagocytes e. erythrocytes