If a cell has a normal osmotic pressure of 4500 mmHg and is placed into a solution with an osmotic pressure of 3500 mmHg, what will happen to the cell?
A. The cell will lose water and its osmotic pressure will decrease.
B. The cell will gain water and its osmotic pressure will decrease.
C. The cell will gain water and its osmotic pressure will increase.
D. The cell will lose water and its osmotic pressure will increase.
A
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A researcher wants to know if gene flow is contributing to evolution of drought tolerance of pitcher plants in a specific bog. As a control, she should
A) Determine if the population is in Hardy-Weinberg equilibrium. B) Transplant pitcher plants from other populations into the bog. C) Estimate the frequency of alleles relevant genes for drought tolerance. D) All of the above. E) None of these. Gene flow does not contribute to evolution.
A mature ovule includes the embryo sporophyte, its reserves of food, and the seed coat. This is collectively called:
a. a fruit b. a seed c. a spore d. the endosperm e. an ovary
Which single event is probably common to all occurrences of speciation?
What will be an ideal response?
Using the Linnaean system of nomenclature, corn is named Zea mays. What is the specific epithet in this name?
a. Zea mays b. Zea c. mays d. Quercus e. corn