A botanist is studying the effects of different oomycete species on potato plants. He exposes one set of plants to an oomycete species having several avirulence (AVR) proteins
He
exposes another set of plants to an oomycete species having a single AVR protein. What do
you expect will be the results of his experiment?
A. Mortality will be higher in plants exposed to
the several-AVR oomycete species.
B. Mortality will be higher in plants exposed to
the single-AVR oomycete species.
C. Mortality rates will be the same in both
plant sets.
A
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The ability of some organisms to alter their membrane lipid composition in response to temperature is known as ________.
Fill in the blank(s) with the appropriate word(s).
Answer the following statements true (T) or false (F)
Genetic heterogeneity refers to mutations in different genes that cause the same symptoms.
Even though the autumn may be unusually warm, the leaves from deciduous trees begin to drop during September
Which of the following is the best explanation? a. The trees are responding to shorter days. b. The autumn months are usually wetter because the summer rains were delayed. c. The effects of phototropism are operating "right on schedule." d. There is not enough sunlight to carry on photosynthesis any longer.
e. The trees are responding to consistent temperatures.What is the name of the characteristic that allows water to have a high surface tension?
A) adhesion B) cohesion C) hydrophilic D) hydrophobic