WSU Biology 106 Final (Hellman&Carloye) Questions and Correct Answers | Latest Update
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Course
WSU Biology
Institution
WSU Biology
Independent variable
-:- Value does not depend on another factor
Dependent variable
-:- Value depends on another factor
Controlled variable
-:- Kept the same throughout the experiment
What are the two key tissues that allow plants to transport water or organic nutrients,
respectively, ov...
✓ -:- They promote growth through chemicals they produce and they also
produce antibodies that protect the roots from disease. Absorb toxic
metals
Why are rhizobacteria beneficial for agriculture?
✓ -:- They can increase crop yield and reduce the amount of fertilizer and
pesticides needed
What is a nodule and what is the reason why they appear sometimes reddish?
✓ -:- It is composed of plant cells that have been "infected" by Rhizobium.
They appear reddish because of a molecule named leghemoglobin, an iron
containing protein that binds reversibly to oxygen. Similar to the
hemoglobin in humans red blood cells
What does the enzyme 'nitrogenase' catalyze?
✓ -:- Atmospheric nitrogen to ammonia
What is the difference between endo- and ectomycorrhizae?
4|P a g e | G r a d e A + | 2 0 2 0 2 5
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