The gritty substance you may feel on your
teeth after using toothpaste is actually
a. small deposits of sand.
b. diatomaceous earth.
c. cellulose from dinoflagellates.
d. a synthetic abrasive.
e. derived from foraminiferans
B
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Which form of transport requires the expenditure of energy?
A. Active transport B. Facilitated diffusion C. Osmosis D. Passive transport
Which cell junction type creates a barrier between two cells?
a. anchoring junctions only b. gap junctions only c. tight junctions only d. both anchoring junctions and gap junctions e. both anchoring junctions, tight junctions and gap junctions
Which group lists the male accessory glands?
a. prostate gland, bulbourethral gland, seminal vesicles b. vestibular gland, seminal vesicles, prostate gland c. bulbourethral gland, prepuce, prostate gland d. seminal vesicles, prepuce, prostate gland e. prostate gland, bulbourethral gland, hypothalamus
Most of the solar radiation arriving at the Earth's surface is reflected out to space
Indicate whether the statement is true or false