When a membrane is said to be selectively permeable, this means that _____
A. half of the membrane is permeable, and the other half is not
B. only water can pass through it
C. the membrane regulates movement of substances into and out of the cell
D. the membrane is permeable only part of the time
Ans: C. the membrane regulates movement of substances into and out of the cell
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The lumen of the digestive tract describes
a. the movement of food along its length. b. its outer covering. c. the space inside. d. muscular layers. e. the twisted path it follows through the abdomen.
____ are leukocytes that produce antibodies
a. Lymphocytes b. Basophils c. Eosinophils d. Monocytes e. Neutrophils
Which white blood cells are particularly attracted to sites of parasitic infections?
A. basophils B. neutrophils C. eosinophils D. lymphocytes E. monocytes
The ABI3 protein acts as a master regulator of seed development, part of the embryo development pathway. Based on what you know from the experiments done by Garces & Sinha, in which Kalanchoe species do you expect the ABI3 gene to be expressed in the leaf margins under normal conditions (not stressful)?
A. K. gastonis-bonnieri B. K. marmorata C. K. daigremontiana D. K. pinnata