Which receptors are responsible for touch, pressure, hearing, and equilibrium?
A) mechanoreceptors B) photoreceptors C) chemoreceptors D) thermoreceptors
Answer: A
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Based on the diagrams in the figure above and on the large population of baby boomers in the United States, which graph best reflects U.S. population in twenty years?
A) A B) B C) C D) D
When a single-gene mutation can have phenotypic effects at multiple stages of development, it is
A. pleiotropic. B. incompletely dominant. C. recessive. D. causing a disease. E. codominant.
Sexual reproduction increases genetic variability through
a. the exchange of genetic information between male and female gametes during meiosis I. b. the random separation of homologous chromosomes. c. the union of male and female gametes. d. crossing over, independent assortment, and random fertilization. e. random assortment of male and female chromosomes.
True/False: Cytotoxic T-cells directly kill the viruses found inside of infected cells.
What will be an ideal response?