Nuclear pores permit the passage of all the following except:
A. proteins inward and outward.
B. DNA molecules only outward.
C. RNA only outward.
Answer: B
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Why is some pollen self-incompatible?
a. so the pollen will more likely disperse via animals or wind b. so the plant will need less energy c. so the plant will need less water d. so there will be a mixing of genes
The flow of which of the following into the mitochondrial matrix provides the chemiosmotic energy for the synthesis of ATP?
(A) Inorganic phosphate (B) ADP (C) Glucose (D) Protons
Actinomycetes form ________.
A. a sheath made of polysaccharides and proteins B. heat-resistant endospores C. prostheca with holdfasts D. substrate mycelia and aerial mycelia
Osteoporosis has long been recognized as a problem for women after menopause, but it is also emerging as a health concern for
A) women and men ages 20-30. B) women ages 16-18. C) men over the age of 65. D) men and younger people in general.