In the figure above, ____ is responsible for soft tissue support
a. tissue A
b. tissue B
c. tissue C
d. tissue D
e. tissue E
ANSWER: d
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Which of the following statements about the sporophyte in brown algae is true?
a. It is diploid and gives rise to spores by meiosis. b. It is diploid and gives rise to spores by mitosis. c. It is haploid and gives rise to spores by meiosis. d. It is haploid and gives rise to spores by mitosis. e. It is triploid and gives rise to endosperm by mitosis.
The water vascular system in echinoderms is used for locomotion, water enters the water vascular
system of a sea star through a structure called the
a. ampulla. b. ossicle. c. radial canal. d. ring canal. e. madreporite.
In the formation of common table salt, sodium and chlorine interact because:a
sodium and chlorine share a pair of electrons. b. sodium and chlorine share two pairs of electrons. c. chlorine donates seven electrons to sodium. d. there is no electron exchange. e. sodium donates one electron to chlorine.
Because the sinoatrial node sends out impulses that initiate each heartbeat, it is often referred to as the ________ of the heart
Fill in the blank(s) with correct word