Geitonogamy involves
(1) Pollination of a flower by the pollen from another flower of the same plant
(2) Pollination of a flower by the pollen from the same flower
(3) Pollination of a flower by the pollen from a flower of another plant in the same population
(4) Pollination of a flower by the pollen from a flower of another plant belonging to a distant population
Pollen tablets are available in the market for
(1) In vitro fertilisation
(2) breeding programmes
(3) supplementing food
(4) Ex situ conservation
Non-albuminous seed is produced in
(1) maize
(2) castor
(3) wheat
(4) pea
An organic substance that can withstand environmental extremes and cannot be degraded by any enzyme is
1. cuticle
2. sporopollenin
3. lignin
4. cellulose
Wind pollination is common in
(1) lilies
(2) grasses
(3) orchids
(4) legumes
Nucellar polyembryony is reported in species of
(1) Gossypium
(2) Triticum
(3) Brassica
(4) Citrus
In which one of the following pollination is autogamous?
(1) Xenogamy
(2) Chasmogamy
(3) Cleistogamy
(4) Geitonogamy
Apomictic embryos in Citrus arise from
(1) synergids
(2) maternal sporophytic tissue in ovule
(3) antipodal cells
(4) diploid egg
Wind pollinated flowers are
1. | small, brightly coloured, producing large number of pollen grains |
2. | small, producing large number of dry pollen grains |
3. | large, producing abundant nectar and pollen |
4. | small, producing nectar and dry pollen |
Endosperm is consumed by developing embryo in the seed of
(1) coconut
(2) castor
(3) pea
(4) maize