Advertisements
Advertisements
प्रश्न
How do the insects help in cross-pollination?
Advertisements
उत्तर
When an insect sits on a flower, the pollens from the anther stick to their wings. The same insect when sits on another flower, the pollens from its wings stick to the stigma of that flower thereby affecting pollination.
APPEARS IN
संबंधित प्रश्न
Match the following:
| Column A | Column B |
| (i) Stigma | (a) Neuron |
| (ii) Pepsin | (b) Carpel |
| (iii) Dendrites | (c) Protein |
| (d) Stamen |
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
What is pollination?
State the function of flowers in the flowering plants.
Name the swollen lower part of the carpel.
What is the function of a flower?
Fill in the following blank with suitable word :
The name of the structure in the flower in which the male gamete is formed is...........
What is made in anther of a flower?
What is seed? What are the parts of a seed? Explain with the help of a labelled diagram.
Describe the process of fertilisation in a flower with the help of labelled diagrams.
Multiple choice question. Tick (✓) the correct choice:
Unisexual flowers are found in
- mulberry
- mustard
- pea
- sunflower
Find an odd one out.
Distinguish between self-pollination and cross-pollination.
Explain the sexual reproduction process in plants with a diagram.
Identify the female gametophyte in angiosperms.
In a flowering plant, archesporium gives rise to ______.
The process of release of eggs from the ovary is called ______
Length of pollen tube depends on the distance between ______
What is puberty?
