(a) Draw a diagram of a mature embryo sac of an angiosperm and label the following parts in it :
(i) Filiform apparatus (ii) Synergids
(iii) Central cell (iv) Egg cell
(v) Polar nuclei (vi) Antipodals
(b) Write the fate of egg cell and polar nuclei after fertilization.

Explanation

### Step-by-Step Solution

#### Part (a): Diagram of a Mature Embryo Sac

1. **Draw the Outline of the Embryo Sac**: Start by sketching a large oval shape to represent the mature embryo sac.

2. **Label the Antipodals**: At the opposite end of the micropyle (the opening), draw three small circles at the chalazal end of the embryo sac. Label these as "Antipodals."

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