Q17 of 48 Page 88

While eating watermelons, all of us wish it was seedless. As a plant physiologist can you suggest any method by which this can be achieved.

A method by which watermelons can be produced seedless is parthenocarpy. Parthenocarpy is the natural or artificial induced development of fruits without the fertilization of ovules or formation of seeds.

Growth hormones can induce parthenocarpy like Gibberellins and auxins inducing parthenocarpy in tomatoes.


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15

Both animals and plants grow. Why do we say that growth and differentiation in plants is open and not so in animals? Does this statement hold true for sponges also?

 16

Define parthenocarpy. Name the plant hormone used to induce parthenocarpy.

 18

A gardener finds some broad-leaved dicot weeds growing in his lawns. What can be done to get rid of the weeds efficiently?

 19

On germination a seed first produces shoot with leaves, flowers appear later,

a. Why do you think this happens?


b. How is this advantageous to the plant?