Which part of the brain regulates and controls involuntary actions?

Which is the correct sequence of the components of a reflex arc?

In which plant do flowers show photonastic movement?

$(a)$ Name the part of the brain which controls:
$(i)$ voluntary actions,
$(ii)$ involuntary actions.
$(b)$ What is the significance of the peripheral nervous system? Name the components of this nervous system and distinguish between the origin of the two.

State whether the following statement is true or false: Abscisic acid inhibits growth.

The shape of guard cells changes due to change in the :