A male fish that uses bright lights at the top of its tail fins to identify itself to females when breeding is a type of:
a. an anglerfish.
b. a lanternfish.
c. an opossum shrimp.
d. a viperfish.
e. a gulper eel.
B
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Why does overwatering a plant kill it?
A) Water does not have all the necessary minerals a plant needs to grow. B) Water neutralizes the pH of the soil. C) The roots are deprived of oxygen. D) Water supports the growth of root parasites. E) Water lowers the water potential of the roots.
Which fields of study most specifically addresses the decline in biodiversity?
a. biology b. ecology c. conservation biology d. wildlife biology e. molecular biology
Plants need both macronutrients and micronutrients to grow. Which chemical is a plant micronutrient?
A) nitrogen B) iron C) magnesium D) sulfur
In a muscle organ like the biceps muscle,
A. the entire muscle is stimulated at the same time. B. several nerve fibers enter the muscle and each stimulates specific muscle cells. C. several nerve fibers enter the muscle, but each fiber stimulates most of the cells in the muscle. D. there are two or three motor units.