Among these contraception methods, the highest risk of accidental pregnancy accompanies _____
A) the use of a diaphragm
B) the use of a condom
C) the practice of coitus interruptus
D) a verified vasectomy
E) the practice of the "rhythm method"
Answer: C
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After mutagenesis and screening, you have found a mutant that is able to grow in soil with high salt content. Chemical analysis showed that this plant has a decreased amount of Na+ relative to normal plants
What kind of mutation do you predict this plant contains? A) mutation in the plasma membrane sodium channel B) mutation in the metallothioneins C) mutation in the tonoplast sodium channel D) mutation in the tonoplast antiporter
The most diverse animal group is the:
a. mollusks b. arthropods c. nematodes d. chordates e. cnidarians
What type of animal can both donate and receive sperm?
A) one that reproduces asexually B) one that has only male gonads C) one that is called a hermaphrodite D) one that undergoes copulation
The patient is awake many times during brain surgery. In an operation to remove a brain tumor, Dr. Judson accidentally poked a certain area of the cerebrum, whereupon the patient said, "Why is my arm being tickled?" What area was poked?
A) medulla B) occipital lobe C) primary somatosensory area D) pons