Marsupials are mammals that
A. do not bear live young.
B. lay eggs.
C. carry their young in a pouch.
D. breathe through gills.
E. have evolved recently.
C. carry their young in a pouch.
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Assuming geological evidence is accurate, life on Earth may have originated
a. 14 billion years ago. b. 4.6 billion years ago. c. 3.5 billion years ago. d. 2.1 billion years ago. e. 1.2 billion years ago.
Each of the following ligands binds to an intracellular receptor except
A) cortisol. B) retinoic acid. C) thyroid hormone. D) epinephrine. E) estrogen.
Phil has chronic ulcers, he has been taking acid blockers and drinking vast amounts of liquid antacids. These help relieve the symptoms but he still suffers from ulcers. What would be the best course of action to treat the source of his ulcers?
A. Reducing the stress in his daily life B. Increasing the dosage of acid blockers C. Taking several different antacids D. Taking a course of antibiotics E. Changing his diet to include more fiber
When Mendel used true-breeding white flowers and true-breeding purple flowers as the parental generation, what were the results? (Purple flower is dominant over white.)
A) All of the offspring had purple flowers. B) Three-quarters of the flowers produced were white and one-quarter were purple. C) One-half of the flowers produced were white and one-half were purple. D) Three-quarters of the flowers produced were purple and one-quarter were white. E) All of the offspring had white flowers.