Calories per unit volume of a food
What will be an ideal response?
Nutritive density
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What is the function of the contractile vacuole?
A. to help single-celled organisms maintain homeostasis in a hypotonic environment B. to help single-celled organisms change shape in response to environmental changes C. to help maintain water balance for singlecelled organisms living in a hypertonic environment D. to maintain cell shape through turgor pressure
Which vertebrates rely on a positive pressure filling mechanism to move air into their lungs?
A. human B. eagle C. bullfrog D. crocodile E. mouse
Roots and shoots lengthen through activity at _____
a. apical meristems c. vascular cambium b. lateral meristems d. cork cambium
If tall (D) is dominant to dwarf (d), and two
homozygous varieties DD and dd are crossed, then what kind of progeny will be produced? a. all intermediate forms b. all tall c. all dwarf d. 1/2 tall, 1/2 dwarf e. 3/4 tall, 1/4 dwarf