Explain how the field of human biochemical genetics had its beginnings partly through the persistence of a young mother
What will be an ideal response?
Borgny Egeland had two children with intellectual disability. Her daughter, Liv, did not walk until she was nearly 2 years of age and she spoke only a few words. Liv also had a musty odor that could not be washed away. Liv's younger brother, Dag, was also slow to develop and never learned to walk or talk. He had the same musty odor as his sister. To learn what was wrong with her children, she went from doctor to doctor, but to no avail. Finally, in the spring of 1934, the persistent woman took the two children, then ages 4 and 7 years, to Dr. Asbjorn Folling, who was a physician and a biochemist. Folling began the research that led to the discovery of phenylketonuria.
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According to astronomers, the universe is
a. contracting. b. getting warmer. c. the same as it was on the day of creation. d. collapsing. e. expanding.
One form of hemophilia is caused by a sex-linked recessive gene. Assume that a man with hemophilia marries a phenotypically normal woman whose father had hemophilia. What is the probability that their first son will have hemophilia?
A) 1/2 B) 1/8 C) 3/4 D) 1/4 E) 1/16
Which one of the following is TRUE regarding an ecological pyramid?
A) An ecological pyramid can depict either the total amount of energy stored at each level of an ecosystem or the total biomass at each level. B) The population of producers depends largely on the populations of consumers below it. C) The amount of energy represented by tertiary consumers is greater than the amount of energy represented by primary consumers. D) Animals such as wolves and eagles would be located at the base of the pyramid. E) The amount of energy represented by producers is equivalent to the amount of energy represented by the secondary consumers.
What description applies to accessory organs?
A) They aren't included in organ systems. B) They secrete enzymes required for digestion. C) They don't contain connective tissue. D) They assist other organs in the circulatory system.