Advertisements
Advertisements
प्रश्न
Differentiate between integument and testa.
उत्तर
| Integument | Testa | |
| 1. | It is the covering of the ovule. | It is an outer covering of seed. |
| 2. | It is thin, one or two layered. | It is quite thick and one layered. |
| 3. | Its cells are living. | Its cells are dead. |
| 4. | Sclereids are absent. | Cells are rich in sclereids. |
| 5. | It arises from the chalazal end of ovule. | It is derived from outer integument of ovule after fertilisation. |
| 6. | It is pre-fertilised structure. | It is a post-fertilised structure. |
APPEARS IN
संबंधित प्रश्न
Draw a diagrammatic sectional view of a mature anatropous ovule and label the following parts in it:
(i) that develops into seed coat.
(ii) that develops into an embryo after fertilization.
(iii) that develops into an endosperm in an albuminous seed.
(iv) through which the pollen tube gains entry into the embryo sac.
(v) that attaches the ovule to the placenta.
Answer the following question.
Draw the diagram of a pistil where pollination has successfully occurred. Label the parts involved in reaching the male gametes to its desired destination.
Given below is the diagram of a human ovum surrounded by a few sperms. Study the diagram and answer the following questions :
(a) Which one of the sperms would reach the ovum earlier?
(b) Identify 'D' and 'E'. Mention the role of 'E'.
(c) Mention what helps the entry of sperm into the ovum and write the changes occurring in the ovum during the process.
(d) Name the specific region in the female reproductive system where the event represented in the diagram takes place.
Ovule is ______.
Among the terms listed below, those that of are not technically correct names for a floral whorl are:
- Androecium
- Carpel
- Corolla
- Sepal
In an embryo sac, the cells that degenerate after fertilisation are ______.
The point at which funiculus touches the ovule is ______.
Nucellus embryo is ______.
Embryo sac occurs in ______.
An embryo may sometimes develop from any cell of embryo sac other than egg. It is termed as ______.
Mature ovules are classified on the basis of funiculus. If micropyle comes to lie close to the funiculus the ovule is termed as ______.
The part of gynoecium that determines the compatible nature of pollen is ______.
Growth of pollen tube towards embryo sac is ______.
Which of the following occupies a central position in flower?
Apomictic embryos in Citrus arise from: ______
Filiform apparatus is a highly thickened structure commonly present in ______.
Megasporangium is equivalent to ______.
Name the parts of pistil which develop into fruit and seeds.
Identify the type of carpel with the help of diagrams given below:
