List the changes observed in an angiosperm flower subsequent to pollination and fertilisation.

'Fertilisation is not an obligatory event for fruit production in certain plants'. Explain the statement.

In a developing embryo, analyse the consequences if cell divisions are not followed by cell differentiation.

Suggest a possible explanation why the seeds in a pea pod are arranged in a row, whereas those in tomato are scattered in the juicy pulp.

Draw the sketches of a zoospore and a conidium. Mention two dissimilarities between them and atleast one feature common to both structures.