Which of the following statements about plant toxins against herbivores is false?
A. Even a little bit of the toxin will be deadly.
B. The toxin may not be toxic unless it is metabolized in the intestine of a herbivore.
C. Some toxins can over stimulate particular physiological processes.
D. The toxin may have also have a bad taste.
E. The toxin may be kept in a membrane-bound structure to keep it from harming the plant.
Answer: A
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In Cell 2,
Consider the following plant cells floating in an open beaker containing 0.2M sucrose. By definition, an open beaker has a pressure potential 0 MPa. Assume that the cells have come to equilibrium with the solution in the beaker.
A. ?p = 0.75 MPa and ?w = 0.0 MPa.
B. ?p = 0.0 MPa and ?w = -0.75 MPa.
C. ?p = -0.25 MPa and ?w = -0.5 MPa.
D. ?p = +0.25 MPa and ?w = -0.5 MPa.
E. ?p = +0.25 MPa and ?w = +0.25 MPa.
Clarify Question
What is the key concept addressed by the question?
What type of thinking is required?
What key words does the question contain and what do they mean?
Gather Content
What do you already know about water potential? How does it relate to the question?
Consider Possibilities
What other information is related to the question? Which information is most useful?
Choose Answer
Given what you now know, what information and/or problem solving approach is most likely to produce the correct answer?
Reflect on Process
Did your problem-solving process lead you to the correct answer? If not, where did the process break down or lead you astray? How can you revise your approach to produce a more desirable result?
Which of the following is a disease caused by a pleiotropic gene?
a. sickle-cell anemia b. pernicious anemia c. aplastic anemia d. iron deficiency anemia e. hemolytic anemia
To a large extent, a protein's function is dependent upon its shape. What determines a protein's shape?
A) The location of the active site B) The sequence of amino acids C) The number of amino acids D) The number of peptide bonds
Viruses cause most human cancers.
Answer the following statement true (T) or false (F)