The hilum is a scar on the
1. Seed, where micropyle was present
2. Seed, where funicle was attached
3. Fruit, where it was attached to pedicel
4. Fruit, where style was present
Seeds offer several advantages to angiosperms. Seed formation is more dependable because:
1. Seeds have better adaptive strategies for dispersal
2. Reproductive processes become independent of water
3. Hard seed coat provides protection to the young embryos
4. They generate new genetic combinations leading to variations
The endosperm is completely consumed by the developing embryo in all of the following except:
1. Pea
2. Groundnut
3. Beans
4. Castor
Endosperm is consumed by developing embryo in the seed of
1. coconut
2. castor
3. pea
4. maize
The micropyle remains as a small pore in the seed coat. During germination, this facilitates entry of:
I. Oxygen
II. Water
1. Only I
2. Only II
3. Both I and II
4. Neither I nor II
Non-albuminous seed is produced in
1. maize
2. castor
3. wheat
4. pea
Seed of castor is
1. non-endospermic, exalbuminous
2. endospermic albuminous
3. endospermic exalbuminous
4. non-endospermic albuminous.
In some seeds, reminants of nucellus are also presistent. This residual, persistent nucellus is the
1. pericarp
2. perisperm
3. chalazosperm
4. mesosperm
Which of the following is not correct?
1. As the seed matures, its water content is reduced and seeds become relatively dry(10-15% moisture by mass)
2. The seed dormancy is the internal or innate inhibition of generation of normal or viable seeds
3. Embryo in dormant seed shows higher rate of general metabolic rate
4. Because of dormancy seeds remain viable for longer period and can be stored
Find correct match
|
|
Column-I |
|
Column-II |
|
a. |
Thick and swollen cotyledons |
(i) |
Castor. |
|
b. |
Unused endosperm in mature seed |
(ii) |
Legumes |
|
c. |
Unused nucellus in seed |
(iii) |
Cashew nut. |
|
d. |
Thalamus contributes in fruit formation |
(iv) |
Beet. |
1. a(iii), b(iv), c(ii), d(i)
2. a(i), b(iii), c(iv), d(ii)
3. a(ii), b(i), c(iii), d(iv)
4. a(ii), b(i), c(iv), d(iii)