Why is the use of iodised salt advisable?

What is the difference between the manner in which movement takes place in a sensitive plant and the movement in our legs?

Compare and contrast nervous and hormonal mechanisms for control and coordination in animals.

How are involuntary actions and reflex actions different from each other?

What is the need for a system of control and coordination in an organism?

How does chemical coordination occur in plants?

Which signals will get disrupted in case of a spinal cord injury?

How does phototropism occur in plants?

What is the function of receptors in our body? Think of situations where receptors do not work properly. What problems are likely to arise?

The brain is responsible for (a) thinking. (b) regulating the heart beat. (c) balancing the body. (d) all of the above.

The gap between two neurons is called a (a) dendrite. (b) synapse. (c) axon. (d) impulse

Which of the following is a plant hormone? (a) Insulin (b) Thyroxin (c) Oestrogen (d) Cytokinin.

Why are some patients of diabetes treated by giving injections of insulin?

How does our body respond when adrenaline is secreted into the blood?

How does chemical coordination take place in animals?

How do auxins promote the growth of a tendril around a support?

Give an example of a plant hormone that promotes growth.

How is the movement of leaves of the sensitive plant different from the movement of a shoot towards light?

What are plant hormones?

What is the role of the brain in reflex action?

How do we detect the smell of an agarbatti (incense stick)?

Which part of the brain maintains posture and equilibrium of the body?

What happens at the synapse between two neurons?

What is the difference between a reflex action and walking?