Study the diagram given below and answer the questions that follows.

(a) Name the parts labelled 1, 2 and 3 in the diagram.

(b) Mention the collective terms for the membranes covering the brain.

(c) What is the function of cerebrospinal fluid?

Make a Punnett square for finding out the proportion of different genotypes in the progeny of a genetic cross between a pure tall (TT) pea plant with a pure dwarf (tt) pea plant.

Given the exact location of interstitial cells.

What is hydrotropism? Give one example.