Research by Harrison and van Buuren illustrates how mycorrhizae can reduce the need for applying
a. nitrogen fertilizer to crops.
b. potassium fertilizer to crops.
c. phosphorus fertilizer to crops.
d. nitrogen fixing plants to soils.
e. nitrogen fixing bacteria to soils.
C
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One strand of DNA has the sequence 5? GGTCTA 3?. What is the sequence of the other strand?
A) 5? CCAGAT 3? B) 5? ATCTGG 3? C) 3? GGTCTA 5? D) 5? TAGACC 3?
An extended period of torpor entered by an animal during the winter when the environment is too cold and food is
scarce is called ____.
a. estivation b. hyperthermia c. thermal acclimatization d. hypothermia e. hibernation
Which of the following most directly gives rise to secondary xylem and phloem?
a. protoderm b. apical meristem c. ground meristem d. vascular cambium e. procambium
Which plasma membrane component is always found on the exterior surface of cells and allow cells to recognize each other?
a. Carbohydrates b. Enzymes c. Cholesterol d. Glycolipids