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प्रश्न
Give a reason for the Following:
Pollen grains of wind-pollinated flowers are produced in large quantities.
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उत्तर
Pollen grains of wind-pollinated flowers are produced in large quantities as it is an abiotic agent of
cross-pollination destruction rate is more.
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संबंधित प्रश्न
List the three stages the annuals and biennial angiosperms have to pass through during their life cycle.
Read the statement and answer the questions that follow.
A flower of brinjal has 520 ovules in its ovary. However, it produces a fruit with only 480 viable seeds.
(a) What could have prevented the rest of the 40 ovules from maturing into viable seeds? Explain giving a reason.
(b) Describe the development of a dicot embryo in a viable seed.
(c) Why certain angiospermic seed albuminous while others are exalbuminous? Explain.
A capsicum flower has 240 ovules in its ovary. But, it produces a fruit with only 180 viable seeds.
A typical flower has ______ different kinds of whorl.
Pollen grains are well preserved as fossils because of the presence of ______
Place the following groups of plants in order, beginning with those that first appeared on the earth and progressing toward those that appeared most recently in time.
Which of the following statement is incorrect?
Match List I with List II:
| List I (Types of Stamens) |
List II (Example) |
||
| A. | Monoadelphous | I. | Citrus |
| B. | Diadelphous | II. | Pea |
| C. | Polyadelphous | III. | Lily |
| D. | Epiphyllous | IV. | China-rose |
Choose the correct answer from the options given below:
Axile placentation is observed in ______.
The male reproductive unit of a flower, the androecium, is made up of individual members called ______.
