Which of the following is NOT caused by the
positive feedback loop of ethylene action?
a. fruit ripening
b. leaf abscission
c. germination
d. cell expansion
e. all of these are caused by the positive
feedback loop of ethylene action
D
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When certain bodies of water develop regions known as "dead zones" it often means that:
A. Oxygen has been depleted. B. Carbon dioxide is not available. C. Nitrogen has become limited. D. Phosphorus has killed animals. E. Plant life no longer can survive.
If a eukaryotic organism does not depend on fatty acids as an energy source, one would expect to find ?-oxidation activity associated with which of the following organelles?
A) cytoplasm B) mitochondrion C) peroxisome D) ribosome E) cell membrane
Where a cold, dry season alternates with a cold, rainy season, __________ dominate. Fill in the blank(s) with the appropriate word(s)
Dmitri Ivanovski demonstrated that TMV was not spread via bacteria by
A. transmitting sap of infected plants from generation to generation. B. treating an infected plant with a broad spectrum of antibiotics before extracting sap. C. filtering sap from an infected plant through pores smaller than bacteria, and then applying it to a healthy plant. D. sterilizing sap from an infected plant and then applying it to a healthy plant. E. spraying sap from an infected plant onto a healthy plant.