Flower || Parts of Flower || Living Being ||
Table of Content:
Difference between Radicle and Plumule, Hylum and Micropyle
A seed stored in closed vessel do not germinate
The leaves of Xerophytes are modified into thorns.
Various vegetation are found nearby the rivers.
From where a germinating seed gets its food?
A newly formed seed do not germinate though it gets suitable conditions.
Draw and label complete flower.
1) Differentiate between:
a) Radicle and Plumule| Radicle | Plumule |
| The lower pointed end of embryo is called radicle. | The upper flat part of embryo is called plumule. |
| It is also called future root of embryo. | It is also called future shoot of embryo. |
b) Hylum and Micropyle
| Hylum | Micropyle |
| It is a clear scar left by the stalk of a seed. | It is a small hole near or abovie the hylum. |
| It represents the point by which seed is attached to the fruit. | It is a small hole in a seed which allows water to enter embryo. |
c) Androecium and gynocium
| Androecium | Gynocium |
| Androecium is the male reproductive part of a flower. | Gynoecium is the female reproductive part of a flower. |
| It is the whorl inner to the corolla. | It is the innermost whorl of the flower. |
| The anther of androecium contains male gametes. | The ovules of ovary of gynoecium contains female gametes. |
| It consists of stamens. | It consists of carpels. |
2) Give reasons:
a) A seed stored in closed vessel do not germinate.
Ans: A seed requires suitable conditions like temperature, air, water and sunlight or darkness for its germination. In a closed condition, a seed does not get suitable conditions and hence does not germinate.
b) The leaves of Xerophytes are modified into thorns.
Ans: The leaves of xerophytes are modified into thorns to prevent transpiration process because very less water is found in deserts.
c) Various vegetation are found nearby the rivers.
Ans: Excess of water is found in nearby the rivers. So various vegetation are found nearby the rivers.
d) From where a germinating seed gets its food?
Ans: A germinating seed gets its food from endosperm or cotyledon.
e) A newly formed seed do not germinate though it gets suitable conditions.
Ans: Many seed require a resting period after falling from the parents plant before they are able to germinate into new plants. Chemical changes take place during the resting period that makes the seed ready for germination. Hence a newly formed seed do not germinate though it gets suitable conditions.
3) Draw and label complete flower.
