Pset7questions2013

A the ph of the soil is too high b the ph of the soil

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A. the pH of the soil is too high B. the pH of the soil is too low C. he has over-fertilized and damaged the roots D. they are not getting enough water Reset Selection Mark for Review What's This? Question 4 of 7 4.0 Points Some years ago, Monterey Pine Trees were introduced to New Zealand by seed. Adult trees did not grow well in New Zealand unless they had been germinated in soil from Monterey. What is the most likely explanation? A. the New Zealand soil was deficient in micronutrients B. the climate was wrong C. the Monterey soil contained an infecting mycorrhizal fungus necessary for proper growth D. the New Zealand soil was lacking potassium
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5/20/13 4:18 PM 2013 Problem Set 7 Plant Biology Lectures 3-7 Page 12 of 13 https://coursework.stanford.edu/portal/tool/1c2f43e9-1653-4e97-98f7-93a4fbb2cb09/jsf/delivery/beginTakingAssessment Reset Selection Mark for Review What's This? Question 5 of 7 4.0 Points So far as we have been able to establish up to now, cobalt (Co) is not a required nutrient for higher plants in general. However, some years ago it was found that when clover plants (which are legumes) were grown in a soil that contained no combined nitrogen (i.e., no NO3 - or NH4 + ) the plants would grow only if the soil contained small amounts of Co 2+ . Suggest a likely explanation. A. Co helps turn organic forms of nitrogen (like proteins) into mineral forms like NO3 - and NH4 + B. Co is a requirement for nitrogen fixation by symbiotic Rhizobium in clover C. Co substitutes for N in biochemical reactions in the leaf D. All the above E. None of the above Reset Selection Mark for Review What's This? Question 6 of 7 4.0 Points Fill in the two blanks in the following sentence. ___________________ are available to the plant in unlimited supply _____________. A. Water and Nitrogen; becaue there is plenty of soil around the plant. B. Sulfur and magnesium; because the plant needs relatively small amounts from the soil C. Phosphorus and iron; because they readily dissolve in soil water D. Calcium and chlorine; because they are easily absorbed by the roots E. Hydrogen and oxygen; as long as sufficient water is available Reset Selection Mark for Review What's This? Question 7 of 7 4.0 Points A root that is in a microenvironment deficient in a nutrient A. usually dies B. directs growth to find the nutrient in the soil C. does not change D. will grow towards light E. secretes basic compounds into the soil.
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5/20/13 4:18 PM 2013 Problem Set 7 Plant Biology Lectures 3-7 Page 13 of 13 https://coursework.stanford.edu/portal/tool/1c2f43e9-1653-4e97-98f7-93a4fbb2cb09/jsf/delivery/beginTakingAssessment Reset Selection Mark for Review What's This? Save Exit Assignment Preview - This is an example student view of this assignment done
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A the pH of the soil is too high B the pH of the soil is...

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