A species-specific ratio of ________ produced in the apical meristem and ________ produced in the root tips maintains a balance between shoot and root growth
A) cytokinins; auxins
B) gibberellins; abscisic acid
C) auxins; cytokinins
D) abscisic acid; ethylene
E) abscisic acid; gibberellins
C
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Photosynthetic organisms like grass are able to ________
A) make all of their organic matter from organic molecules in the soil. B) use water they take in through their leaves as a final electron acceptor. C) change the light energy from sunlight into sugars D) use substances in the air as a major source of carbon.
Four of the following statements are true of xylem. Which one is the exception?
A. Conducts water up the plant B. Conducts mineral ions up the plant C. Connects with roots D. Connects with leaves E. Transports sugars
During cellular reactions, electrons may be removed from compounds such as glucose and picked up by a coenzyme known as NAD+. When NAD+ gains these electrons, it is said to be
A. oxidized. B. synthesized. C. reduced. D. dehydrated.
Available evidence is consistent with the proposal that prion diseases are caused by infectious proteins.
Answer the following statement true (T) or false (F)