Malaria may be prevented by
A. taking prophylactic drugs.
B. using bed nets sprayed with insecticide.
C. eliminating standing water.
D. using genetically engineered mosquitoes.
E. All of the choices are correct.
Answer: E
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Which statement correctly describes infertility?
a. Infertility only occurs in females. b. Infertility is always caused by low sperm counts in males. c. Infertility is diagnosed when a couple is unable to become pregnant after 7 months. d. Female infertility is only caused by hormonal imbalances. e. Female infertility may be caused by environmental factors, such as rigorous physical exercise.
What are the four major classes of chromosomal rearrangements?
A) inversions, duplications, translocations, deletions B) duplications, reciprocal translocations, nonreciprocal translocations, inversions C) deletions, inversions, duplications, point mutations D) translocations, pericentric inversions, paracentric inversions, deletions
An adventitious root is indicated by
a. A. b. B. c. C. d. B and C. e. none of these.
The transfers of motor, sensory, and cognitive information between the brain hemispheres is facilitated by the major neural connection between the right and left hemispheres of the human brain. This "bridge" is called the
A. motor cortex. B. reticular formation. C. basal nuclei. D. thalamus. E. corpus callosum.