A man and woman are each heterozygous for the autosomal recessive gene for albinism. They already
have two non-albino children and want to have two more. What is the probability that their next two
children will be phenotypically identical to each other with regard to skin color (i.e., either both albino
or neither albino)?
a. 1/16
b. 3/16
c. 4/16
d. 9/16
e. 10/16
E
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A nucleic acid contains thymine, allowing you to conclude that:
A. this nucleic acid is DNA. B. this nucleic acid is RNA. C. this nucleic acid could be either DNA or RNA.
What is the main method of dispersal of fungal spores over long distances? a. Carried on water currents
b. Attached to the body parts of insects. c. Spread by human travel across the globe. d. Attached to the legs of birds. e. Blown by the air currents.
Select the TRUE statement(s) about respiratory diseases. (Select all that apply.)
a. Severe mountain sickness can cause pulmonary edema. b. Smoking often damages alveolar walls, making oxygen delivery difficult or impossible. c. At high altitudes, humans adapt by enlarging the lungs and increasing the number of alveoli. d. Severe mountain sickness causes pulmonary edema due to high pressures in the pulmonary artery, induced by hypoxia and the sympathetic nervous system.
Usually, a river ________ at its source compared to farther downstream
A) has less phytoplankton B) is warmer C) is wider D) flows more slowly