Tightly curled or wooly hair is caused by a dominant gene in humans. If a heterozygous curly-haired person marries a person with straight hair, what percentage of their offspring would be expected to have straight hair?
A) 100% straight
B) 50% straight
C) 75% straight
D) 25% straight
E) It is impossible to predict the outcome.
B
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You might infer from packages of commercial fertilizer that which of the following nutrients are most limiting to plant growth?
a. Carbon, nitrogen and phosphorous. b. Nitrogen, phosphorous and potassium. c. Hydrogen, phosphorus and magnesium. d. Iron, Magnesium and nitrogen. e. Phosphorus, potassium, and calcium.
You look in the microscope and see sister chromatids moving to opposite sides of the cell. You conclude the cell is in
A. prophase. B. telophase. C. interphase. D. metaphase. E. anaphase.
r-selected species tend to have type III survivorship curves.
Answer the following statement true (T) or false (F)
HIV is a virus that is particularly difficult to eradicate
A) because of the size of its DNA genome. B) because it rarely mutates. C) because after it mutates it can be resistant to drugs. D) due to its small size.