Which of the following is true about Marfan syndrome?
A. The cause is an autosomal recessive mutation.
B. The affected gene produces a defective form of the protein actin.
C. Connective tissues comprising the heart and blood vessels are weakened.
D. One in 5,000 men are affected.
E. Those affected are often very short and have mental impairments.
Answer: C
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Which type of reaction will convert molecules with low energy into ones with high energy? a. Entropy b. None of these choices
c. Exergonic d. Endergonic e. Kinetic
One of the lines of evidence supporting the theory that modern humans originated in Africa is that the modern-day human population of Africa contains the greatest diversity of genetic variants of any human population
Why is this consistent with the idea that humans first evolved in Africa?
If the heritability of criminality is 0.55 in twin studies, what inference can be made about "nature versus nurture" for determining criminality?
a. Children of criminal have a 55% chance of becoming criminals b. Criminal is mainly due to differences in environmental conditions. c. Equal chances exist for any chiold to become a criminal if raised in that environment d. Fifty-five percent of the variability is due to differences in genotypes.
The lymphatic system
A. contains cells. B. has valves. C. is found throughout the body. D. All of the above are correct.