Asked by Jannatul Ferdous on Apr 27, 2024
Verified
Chrysanthemums and other short-day plants flower only when the ____.
A) hours of darkness are greater than a critical value
B) hours of darkness fall below a critical value
C) light exposure is constant for a few days
D) temperatures fall below a critical value for an extended period of time
E) temperatures are above a critical value for an extended period of time
Short-day Plants
Plants that flower only when the daylight duration is less than a critical length, indicating that they are photoperiod sensitive.
Light Exposure
The duration and intensity of light a living organism or chemical substance is subjected to, affecting processes like photosynthesis and circadian rhythms.
- Explain the importance of photoperiodism in flowering and mechanisms of action in short-day plants.
Verified Answer
ZK
Zybrea KnightMay 03, 2024
Final Answer :
A
Explanation :
Short-day plants like chrysanthemums flower when the hours of darkness exceed a certain critical length, indicating they require long nights to initiate flowering.
Learning Objectives
- Explain the importance of photoperiodism in flowering and mechanisms of action in short-day plants.