Expand the abbreviation — DNA.

Study the diagram given below and answer the questions that follow:

(a) Name the phenomenon depicted by the shoot in the above diagram.

(b) Which plant hormone plays an important role in the above movement?

(c) Complete and rewrite the given statement by filling in the correct terms:

Shoots show positive …………… whereas, roots show positive …………… .

State Mendel's 'Law of Segregation'.

Mention the two pairs of nitrogenous bases which pair with each other with hydrogen bonds.