The different seasons of the year are caused by the
A. gravitational pull of the moon as it travels around the Earth.
B. tilt of the Earth's axis as the Earth travels around the Sun.
C. rotation of the moon around the Earth.
D. rotation of the Earth on its axis.
E. rotation of the Earth around the Sun.
Ans: B. tilt of the Earth's axis as the Earth travels around the Sun
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The increased osmolarity of the filtrate after Bowman's capsule is caused by:
A. diffusion of NaCl out of the proximal tubule. B. diffusion of HCO3– out of the proximal tubule. C. active transport of NaCl out of the proximal tubule. D. active transport of HCO3– out of the proximal tubule.
Adulthood and mating of helminths occur in which host?
A. Primary host B. Transport host C. Definitive host D. Secondary host E. Mating occurs in all hosts.
The dominant Huntington disease allele causes severe neural/brain damage at approximately age 40. A female whose mother has Huntington disease marries a male whose parents are normal. It is not known if the female has the disease. Keeping in mind that the disease allele is rare in the population, what is the probability that their firstborn will inherit the gene that causes Huntington disease?
A) 25% B) 50% C) 75% D) 100% E) 0%
Which of the following adaptations occurs with aerobic exercise training?
What will be an ideal response?