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प्रश्न
Explain the terms 'cross-pollination'?
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उत्तर
In cross pollination, pollens from the anther of one flower are transferred to the stigma of the another flower of another plant but of the same species.
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संबंधित प्रश्न
A student was asked to observe and identify the various parts of an embryo of a red kidney bean seed. He identified the parts and listed them as under:
I. Tegmen
II. Testa
III. Cotyledon
IV. Radicle
V. Plumule
The correctly identified parts among these are
(A) I, II and III
(B) II, III and IV
(C) III, IV and V
(D) I, III, IV and V
The fusion of male and female gametes is termed as ______.
Name the part made up of the stigma, style and ovary.
What is the name of female part of a flower?
Fill in the following blank with suitable word :
The.......... at the base of the carpel contains egg cells.
Describe the process of fertilisation in a flower with the help of labelled diagrams.
Multiple choice question. Tick (✓) the correct choice:
The male gamete is present inside the which germinates.
- the style
- the stigma
- the anther
- the ovary
What are the male and female gametes in a flowering plant?
Give one example each of unisexual and bisexual flowers. Differentiate between the two types of pollination that occur in flowers. What happens when a pollen lands on a suitable stigma? Write about the events that occur till the seed formation in the ovary.
Describe an activity to demonstrate phototropism.
Mention pollination types.
What is cleistogamy? Write one advantage and one disadvantage of it, to the plant.
Pollen tube reaches the embryo sac via style.
Give scientific reason.
Fertilization in plants is called double fertilization.
The male reproductive part of a flower is ______.
The anther wall consists of four wall layers where ______
Antipodal cells are present towards the ______ in an anatropous ovule.
Conidia are formed endogenously while zoospores are formed endogenously.
The ovaries of different flowers may contain ______.
State the number of sets of chromosomes present in a zygote.
