The endosperm is completely consumed by the developing embryo in all of the following except:
1. Pea
2. Groundnut
3. Beans
4. Castor
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
Why do seeds need water to germinate?
(1) Following hydration, enzymes break down stored food and make it available for the embryo.
(2) Water provides energy.
(3) Water activates the chlorophyll molecules so that photosynthesis can begin.
(4) Water dissolves the minerals in the soil so that they become available to the seed.
Non-albuminous seed is produced in
(1) maize
(2) castor
(3) wheat
(4) pea
Endosperm is consumed by developing embryo in the seed of
(1) coconut
(2) castor
(3) pea
(4) maize
Perisperm differs from endosperm in
1. being a haploid tissue
2. having no reserve food
3. being a diploid tissue
4. its formation by fusion of secondary nucleus with several sperms
Seed of castor is
(1) non-endospermic, exalbuminous
(2) endospermic albuminous
(3) endospermic exalbuminous
(4) non-endospermic albuminous.
Select the option that contains all plants which produce non-endospermic seeds.
(1) Gram, Pea, Bean, Groundnut
(2) Castor, Peanut, Orchid, Wheat
(3) Coconut, Walnut, Wheat, Gram
(4) Castor, Maize, Coconu, Orchid
In some seeds, reminants of nucellus are also presistent. This residual, persistent nucellus is the
(1) pericarp
(2) perisperm
(3) chalazosperm
(4) mesosperm