Irises and other ____ plants flower only when the hours of darkness fall below a critical value, typically in summer.

A. short-day
B. long-day
C. annual
D. biennial
E. perennial


Answer: B

Biology & Microbiology

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Otto Loewi demonstrated that neurons transmit signals across synapses by ____

a. electrical signals b. calcium channels c. acetylcholine d. chemical signals e. proteins

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The hormonal control over excretion most likely occurs in the

a. Bowman's capsule. b. proximal tubule. c. distal tubule. d. loop of Henle. e. urinary bladder.

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The ________ is the temperature at which atmospheric water condenses

Fill in the blank(s) with correct word

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Which of the following is altered in a program to increase flexibility?

What will be an ideal response?

Biology & Microbiology