The long extension of a cell that can propel a cell forward by whipping back and forth (such as human sperm) is called a ________.
A. flagellum
B. vesicle
C. cilium
D. pilus
Answer: A
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In humans, the gonads ____
a. produce gametes only b. secrete hormones only c. nourish the embryo only d. produce gametes and secrete hormones only e. produce gametes, secrete hormones, and nourish the embryo
Paired excretory organs found in most body segments of segmented worms are called
a. metanephridia. b. parapodia. c. septa. d. clitella. e. setae.
During photosynthesis, plants convert light energy to chemical energy. This is an example of
A) increasing entropy. B) a spontaneous reaction. C) the second law of thermodynamics. D) chemical equilibrium. E) the first law of thermodynamics.
Cryptococcus neoformans is a gram-negative cocci with a thick capsule
Indicate whether the statement is true or false