Why do people tend to get shorter as they age?
a. they hunch over due to fatigue
b. their bones become shorter
c. their muscles become shorter
d. the intervertebral disks deteriorate
e. the vertebral height diminishes
D
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Gnetophytes are more closely related to angiosperms than to other gymnosperms
A. true B. false
Goblet cells are located in columnar epithelium and secrete mucus.
a. true b. false
The scanning tunneling electron microscope uses a probe to measure voltage differences across the surface of a specimen. The specimen may be a small, nearly flat surface. A computer tracks the movement of the probe and creates a three-dimensional image of the specimen. The image allows you to see the location of individual atoms. This was not possible with older microscopes. What is an advantage offered by the scanning tunneling microscope?
A) It measures voltage differences. B) It uses a probe to scan an object. C) It allows imaging at the atomic level. D) It requires a computer.
Common skin warts are the result of infection with
A) poxviruses. B) herpesviruses. C) papillomaviruses. D) rubeola virus. E) parvoviruses.