In a flowering plant, archesporium gives rise to:

A dioecious flowering plant prevents both:

Which one of the following plants shows a very close relationship with a species of moth, where none of the two can complete its life cycle without the other?

Double fertilization is:

In some plants, the female gamete develops into an embryo without fertilization. This phenomenon is known as:

To ensure that only the desired pollens fall on the stigma in artificial hybridization process: a: the female flower buds of plant producing unisexual flower need not be bagged. b: there is no need to emasculate unisexual flowers of selected female parent. c: emasculated flowers are to be bagged immediately after cross pollination. d: emasculated flowers are to be bagged after removal of anthers. e: bisexual flowers, showing protogyny are never selected for cross. Choose the correct answer from the options given below:

Which of the following statements is not correct?

In a cereal grain, the single cotyledon of the embryo is represented by:

In which one of the following, both autogamy and geitonogamy are prevented?