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प्रश्न
Distinguish between unisexual and bisexual flowers giving one example of each. Draw a diagram showing process of germination of pollen grains on stigma and label the following parts:
(a) Female germ cell
(b) Male germ cell
(c) Ovary
उत्तर
|
Unisexual Flower |
Bisexual Flower |
|
The flower has either stamen or pistil only are called unisexual flowers. |
The flower has both stamen and pistil are called bisexual flowers. |
|
Example: Papaya |
Example: Hibiscus |
Diagram showing germination of pollen grain on stigma:
APPEARS IN
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 chromosomal number of the sexually producing parents and their offspring is the same." Justify this statement.
Write the names of those parts of a flower which serve the same function as the following do in the animals :
(i) testis,
(ii) sperm,
(iii) ovary,
(iv) egg
Name the swollen lower part of the carpel.
__________ is present in unisexual flower.
Find an odd one out.
Distinguish between self-pollination and cross-pollination.
Complete the table
| Carly x | ______ | ______ |
| ______ | petal | attract insects |
| Androecium | ______ | Male reproductive part |
| ______ | ______ | Female reproductive part. |
Consider the following three flowers namely X, Y and Z. Which flower(s) would develop into a fruit?
| Flower X | Flower Y | Flower Z |
 |
 |
 |
Explain the post fertilization changes that occur in the ovary of a flower.
