Lymph returns to the circulatory system
A. because it is pumped by the heart.
B. by entering large veins near the heart.
C. by seeping into capillaries.
D. when it enters arteries.
B. by entering large veins near the heart.
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The endocrine gland that is often called the master gland because of its influential role in regulating the other endocrine glands is the
A) thyroid B) pineal C) adrenal D) pituitary
An ecological niche
A) is formed by the physical environment only. B) is a constantly changing place. C) is the same thing as a habitat. D) cannot be shared by two species. E) depends on the weather.
The necessity for elaborate sterilization procedures in hospitals and canneries is due to
a) endospores. b) fungal spore. c) vegetative cells. d) protozoan cells. e) viruses.
List the layers of the gastrointestinal tract wall, starting with the outer layer and moving inward.
What will be an ideal response?