Control and Coo...

Which plant hormone induces the phenomenon of phototropism in plants?

Read the given statements and identify the plant hormones X, Y and Z.
(i) Hormone Y suppresses flowering in mango and also promotes rapid internode/petiole elongation in deep water rice plants and hence helping leaves or upper part of shoot to remain above water.
(ii) Hormone X promotes root growth and root hair formation.
(ii) Hormone Z inhibits the seed germination, increases the tolerance of plant to various stresses, play important role in seed development maturation and dormancy.

Which one of the following statements is correct?

Reflex actions are mainly controlled by:

Growth of pollen tube towards embryo sac is?

The given figure shows lateral view of the human brain. Identify the parts labelled as A to E and select the correct option.

Observe the experimental sets $$[A]$$ and $$[B]$$.
Observe the test tube $$A$$ and $$B$$. From the list given below, choose the combination of response of shoot and root that are observed in $$B$$.

The appetite and satiety centres in the brain of man are located in the region of the 

Which of the following is not a reflex action?

Nodes of Ranvier are found in