Which of the following statements are true of Trichomonas vaginalis?
_____ It attacks the human genitourinary tract.
_____ It lacks mitochondria.
_____ It is a member of the supergroup Discoba.
_____ It synthesizes its own organic nutrients.
_____ It uses flagella for movement.
__X__ It attacks the human genitourinary tract.
_____ It lacks mitochondria.
__X__ It is a member of the supergroup Discoba.
_____ It synthesizes its own organic nutrients.
__X__ It uses flagella for movement.
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Some freshwater and marine fishes that are osmoregulators are estimated to expend _____ of their resting metabolic energy on osmoregulation
A. 10% B. 20% C. 30% D. 50% E. 60%
The genes that play a role in the biological clock form part of gene storing structures in the
nucleus known as
a. nucleotides. b. chromosomes. c. tissues. d. proteins
Once the threshold potential of a nerve impulse
is acheived
a. an action potential may occur or it may not. b. an action potential will occur. c. sodium ions close. d. the resting potential immediately follows. e. none of these will happen.
The breakdown of tooth enamel is called tooth decay, cavities, or dental _______
Fill in the blank(s) with the appropriate word(s).