Recent expeditions into New Guinea found
a. dozens of new species of animals.
b. plants that had plate-sized flowers.
c. a bird that was thought to be extinct.
d. New Guinea has a history of several billion
years.
e. all of these.
Answer: e
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Which of the following statements is false
concerning X chromosome inactivation? a. It is an accident of evolution. b. It is an example of dosage compensation. c. It is a gene control mechanism. d. Normal development of female embryos depends on it. e. It does not occur in males.
Which of the following features is associated with pica?
Select one: a. person is a greater risk for various poisoning b. person has an irrational fear of getting fat c. individual engages in extreme physical activity to avoid weight gain d. person conducts self-induced vomiting and laxative abuse e. individual frequently eats large amount of foods while feeling a loss of control
What do type A positive and AB negative blood have in common?
A. anti-B antibodies and Rh antigens B. A antigens C. A and B antigens D. A antigens, anti-B antibodies E. A antigens and Rh antigens, anti-B antibodies
The ratio of leghemoglobin-bound O2 to free O2 in the root nodule is on the order of
a. 1000:1. b. 10,000:1 c. 100,000:1. d. 1,000,000:1.