Which of the following are the most commonly used mammals for genetic studies?
a. Humans
b. Xenopus laevis
c. Mice
d. Cats
Ans: c. Mice
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Bacteria causes acne by
a. infecting the epidermis. b. infecting the ducts of sweat glands. c. infecting hair follicles. d. infecting subcutaneous tissue. e. infecting the ducts of oil glands.
WHich of the following glands may function in helping to control the reproductive cycle?
a. thyroid b. pineal c. thymus d. pancreas e. kidney
Which of the following is not a reason we become shorter as we age?
a. As a person ages, the intervertebral discs become thinner and the vertebrae will be stacked closer together, resulting in shorter stature. b. As a person ages, vertebral bodies lose bone mass (osteoporosis) resulting in smaller vertebrae that stack closer together. c. As a person ages, scoliosis may develop resulting in an abnormal spinal curvature and shorter stature. d. As a person ages, the ligaments connecting vertebrae together are weakened, resulting in a more pronounced kyphosis. This posterior curvature of the spine lowers the skull, making you shorter.
A substance moving from outside the cell into the cytoplasm must pass through ______.
Fill in the blank(s) with the appropriate word(s).