What would need to change to allow sodium and potassium ions to easily diffuse through plasma membranes?
A. They would have to shrink in size.
B. The low solubility that they have in lipids would have to increase.
C. The high solubility that they have in lipids would have to decrease.
D. The high solubility that they have in water would have to decrease.
E. The low solubility that they have in lipids would have to increase, and the high solubility that they have in water would have to decrease.
E. The low solubility that they have in lipids would have to increase, and the high solubility that they have in water would have to decrease.
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In Drosophila, the genes y (yellow body) and car (carnation eyes) are located at opposite ends of the X chromosome. In doubly heterozygous females (y+car+ / ycar), a single chiasma is observed somewhere along the X chromosome in 90% of the examined oocytes. No X chromosomes with multiple chiasmata are observed. What percentage of the male progeny from such a female would be recombinant for y and car?
A) 5% B) 10% C) 45% D) 55% E) 90%
In the black bread mold, zygospore production begins with development of hyphal branches whose cytoplasm is isolated from the rest of the mycelium by cross walls. These structures are known as
a. asci b. basidia c. gametangia d. conidia e. sporangia
How many does 1m equal?
A. 100 mm B. 1000 mm C. 100 cm D. .01 cm
Which of the following results from an unequal sharing of electrons between atoms?
A) Nonpolar covalent bond B) Polar covalent bond C) Ionic bond D) Hydrogen bond E) Electron-proton interaction