A little girl was playing in the snow one day and found that she was wiping her nose quite often. The "runny nose" that she was experiencing due to the cold temperatures resulted from
A) an insufficient production of mucus.
B) an inadequate supply of blood to the nasal epithelium.
C) the slowed activity of nasal cilia.
D) a buildup of tears in the nasal septum.
E) the inability of the sinuses to drain.
C
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A woman's husband is a Type I diabetic. He gives her a pen and tells her to inject him with its contents if he ever passes out due to low blood sugar. What hormone does this pen likely contain?
A. Insulin B. Oxytocin C. Glucagon D. Glycogen
If you put chloroplasts in the dark, they can continue to make sugar if provided with
a. NADPH, ATP, and CO2. b. NADPH and ATP. c. CO2 and ATP. d. NADPH, CO2, and ADP. e. water and ATP.
What is the basis of Herman Muller's Ratchet theory?
A. That parthenogenesis does not increase genetic variability. B. That once harmful mutations arise, asexual populations have no way of eliminating them. C. That meiosis reduces the chromosome number in half. D. That synapsis must occur for crossing over to take place. E. That evolution is due to mutations, not crossing over.
One can think of F as:
a. the probability of two alleles being identical by descent. b. a measurement used to quantify the loss of variation due to drift over time. c. a measure of the degree of inbreeding. d. A and B. e. All of the above.