If the phloem in a tree trunk were to become blocked, how would this affect the plant?
A. Water could not be sent to the roots.
B. Sugars could not be transported from leaves to roots.
C. The leaves would dry out.
D. Sugars could not be made.
Answer: B
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Which of these organisms is semalparous?
A. humans B. oak trees C. bears D. dogs E. agave plants
Fetal development occurs during which time frame after fertilization?
Why scientist has to carefully describe their methodology in articles?
A. To show how much they work. B. So no one could copy their ideas and repeat the protocol. C. To other scientist can verify their results or try the same protocol in other circumstances. D. To prove that their conclusion are related to the introduction.
C4 plants have better water conservation abilities than do many other plants (especially C3). This is because:
a) C3 plants are able to keep their stomata closed during the day. b) C4 plants have smaller stomata that are protected by hairs and pits. c) C4 plants open their stomata at night. d) C4 plants have no leaves, they use their stems for photosynthesis. e) C4 plants have the ability to obtain CO2 without opening their stomata.