Mechanisms of Timing and Control

Mr. Anderson discusses mechanisms of timing and control in plants, animals, and bacteria. He explains phototropism and photoperiodism in plants, highlighting the role of auxin and phytochromes. In animals, circadian rhythms are explored, focusing on melatonin and the pineal gland. Finally, quorum sensing in bacteria is covered, illustrating how bacteria communicate and adapt to their environment.

What is jetlag and how does it affect the circadian rhythm?

Explain the concepts of phototropism and photoperiodism in plants.

How do animals and fungi exhibit circadian rhythms?

Describe the process of quorum sensing in bacteria.

What role does auxin play in plant growth towards light?

How do phytochromes help plants determine the time of day?

How do different plants respond to varying lengths of day and night?

What physiological responses do plants exhibit in relation to light?

Discuss the significance of melatonin in regulating human circadian rhythms.

What are the implications of jetlag on human health?