________ occurs when a chemical signal secreted by the roots of one plant blocks the germination of nearby seeds or inhibits the growth of a neighboring plant.

A. Etiolation
B. The systemic response
C. Allelopathy
D. Nodulation
E. Reduction


Answer: C

Biology & Microbiology

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Briefly describe the coevolution of predators and prey. Does this concept apply to parasites and hosts?

What will be an ideal response?

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Urine cannot escape back to the ureter from the bladder because there is/are blocking the way.

a. A valve b. mucosa c. Two valves d. A flap of muscle

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A substance that helps to maintain a stable pH is a(n) ________

Fill in the blank(s) with correct word

Biology & Microbiology