Plz give me cases (examples)of biological clock in both animal and plant kingdom.?

Question

I want it for my assingments,these examples should be other than opening of flower buds and sleeping of animals.Thnx.

Answer 1

Bees rely on the biological clock for timing visits to flowers when nectar and pollen flow is at its highest. They can learn to reach flowers at nine different points of time during the day within an accuracy of about 20 minutes. The clock is also essential for navigation that uses the sun as a compass because the sun moves during the day from east to west. Bees, whose bodies are slightly longer than one centimeter, precisely navigate to flowers situated as far as 10 km from their beehive.


--> http://www.sciencedaily.com/releases/2006/10/061025185102.htm

Researchers at the University of Cambridge found that the biological clock in plants increases photosynthesis, helping them grow faster. The biological clock, which allows individual plant cells to estimate the time of day, helps boost global productivity by providing cells with the facility to anticipate daily changes in the environment.
--> http://www.physorg.com/news5375.html

Answer 2

Elephants travel for day and weeks to die in a certain area.

Salmon swim upstream to the exact river or tributary the were birthed in to spawn.

Pollen and seeds are released during a particular season (generally Spring)

Hope these help.