Question : Heterosis I. means the increased vigour of a hybrid than its parent. ii. Has been experimentallyintroduced in a large number of plants and animals iii.in plants is expressed in increased number of zygotes. iv. In animals is expressed as increased resistance to environmental factors.choose the correct option.

Question : Heterosis I. means the increased vigour of a hybrid than it

1.	Question : Heterosis I. means the increased vigour of a hybrid than its parent. ii. Has been experimentallyintroduced in a large number of plants and animals iii.in plants is expressed in increased number of zygotes. iv. In animals is expressed as increased resistance to environmental factors.choose the correct option.
Answer» I and II II and III only IV III and IV Answer :A