When phosphorus is abundant in soils, it may by unavailable to plants because _____.
_____ the phosphorus is bound to nitrogen.
_____ the phosphorus is unlimited.
_____ the phosphorus is bound to clay.
_____ the phosphorus is in a form that is not taken up by plants.
_____ the phosphorus is bound to nitrogen.
_____ the phosphorus is unlimited.
__X__ the phosphorus is bound to clay.
__X__ the phosphorus is in a form that is not taken up by plants.
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Which type of plant tissue would be found ONLY in the circled areas of the plant shown?
A. meristem tisssue B. vascular tissue C. dermal tissue D. ground tissue
The tongue does all of the following except
A) taste food. B) shape food into a ball called a bolus. C) secrete saliva. D) push food into the pharynx.
Which of the following statements concerning allografts is TRUE?
A) They are the best type of transplants because they are not associated with rejection. B) They induce strong type IV hypersensitivity reactions and must be treated with immunosuppressive drugs. C) They always require complete destruction of the recipient's bone marrow cells. D) They are impossible to perform because the antigens between donor and recipient are so different. E) They are the rarest type of transplants.