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Home Q & A Board Biology-Related Homework Help General Biology
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Jade.Lee Jade.Lee
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6 years ago
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

Question 2

The flowers of plants pollinated by night-flying bats open, secrete nectar, and release fragrance only at night. The
  mechanism that controls this is called ____.
  a. thigmotropism
  b. heliotropism
  c. phototropism
  d. photoperiodism
  e. circadian rhythm
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Roshni411Roshni411
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6 years ago
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Jade.Lee Author
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6 years ago
Brilliant ツ
mikeh209
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Yesterday
Helped a lot
einstein
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2 hours ago
This site is awesome
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