The response of a plant related to the length of the day and night is called:
Correct answer: D. Photo-Periodism
- A. Photo-receptor
- B. Photo-taxis
- C. Photo-tropism
- D. Photo-Periodism
Explanation
Photoperiodism is the ability of plants and animals to measure environmental day length (photoperiod), typically by monitoring night length. This process underlies a biological calendar. Photoperiod is inversely correlated to the nightly duration of melatonin secretion in animals.
This question appeared on the ETEA MDCAT 2014 paper, which you can sit online with every answer explained.
Report an error
The more specific you are, the faster it gets fixed. A source beats an opinion.
Prefer email? support@testustad.com
About Plant Growth Regulators
Plant growth regulators are chemical messengers that control growth, development and responses to the environment. The topic covers auxins, gibberellins, cytokinins, abscisic acid and ethylene, including cell elongation, apical dominance, tropisms, seed germination, dormancy, fruit ripening and leaf fall, with growth promoters distinguished from inhibitors.
Practise Forms and Functions of Plants
272 free Forms and Functions of Plants MCQs from Biology, each with the correct answer and an explanation. Unlimited attempts, no account needed.
Discussion
Stuck on an option, or know a faster way to get there? Ask or explain it here.
No comments yet. Be the first to explain this one.
Exams that ask Biology questions like this
Biology is on 8 papers prepared for on TestUstad, and all of them draw the same bank, so this question is worth knowing for every one of them.
More Plant Growth Regulators questions
Pulvinus tissues are present at:
The phenomenon that a seed fails to germinate in spite of providing all conditions necessary for germination is _
Florigen is produced by:
The temperature required for vernalization is approximately:
A hormone that helps in growing seedless grapes.
Vernalization is the conversion of: