Exterior to the plasma membrane, plant cells have ________ which protect and support the plant cell.
Fill in the blank(s) with the appropriate word(s).
cell walls
Exterior to the plasma membrane, plant cells have cell walls which protect and support the plant cell.
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Microbes sometimes make metals such as mercury more volatile and lipid soluble by ________.
A. phosphorylation B. methylation C. aggregation D. None of the choices are correct.
Which type of solution will have a high overall solute concentration? a. Balanced b. None of these choices
c. Isotonic d. Hypertonic e. Hypotonic
The cells that line your small intestine absorb nutrients. Their cell membranes consist of many extensions and folds that project into the open space of the intestine. Why is this cell structure advantageous in the small intestine?
What will be an ideal response?
In the systemic arteries, the partial pressure of oxygen is approximately ________, and hemoglobin is approximately ________ saturated with oxygen.
A) 40 mm Hg : 75% B) 100 mm Hg : 75% C) 60 mm Hg : 50% D) 40 mm Hg : 50% E) 100 mm Hg : 98%