Methanogens can live only in ________ environments.
A. anaerobic
B. microaerophilic
C. aerobic
D. All of the choices are correct.
Answer: A
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Which of the following is responsible for retrograde axonal transport?
A) cytoplasmic dynein B) kinesin 5 C) kinesin 13 D) myosin V E) kinesin 1
When feces are not expelled regulary, additional water is absorbed from them. This may lead to a condition called_________
Fill in the blank(s) with the appropriate word(s).
In apples, the allele A is dominant for a big size apple and the allele R is dominant for red color. You cross one tree that produces big yellow apples and another tree that produces small red apples. Half of the offspring trees produce big red apples and half produce big yellow apples. What are the genotypes of the parents?
a. AArr and aaRr b. Aarr and aaRr c. AARr and AArr d. AaRr and AaRr e. AaRr and aarr
A child is born with a rare disease in which mitochondria are missing from skeletal muscle cells. However, the muscles still function. Physicians find that the
A) muscles contain large amounts of lactate following even mild physical exercise. B) muscles contain large amounts of carbon dioxide following even mild physical exercise. C) muscles require extremely high levels of oxygen to function. D) muscle cells cannot split glucose to pyruvate.