Which of the following combinations of floral characteristics would MOST effectively promote cross-pollination?
Monoecy, self-compatibility, and homogamy
Dioecy, self-incompatibility, and protandry
Cleistogamy, self-compatibility, and protogyny
Hermaphroditism, self-compatibility, and synchronized pollen and stigma maturity
Related Questions
Bright colouration of flowers is an adaptation for
Anemophily
Hydrophily
Malacophily
Entomophily
In water hyacinth and water lily, pollination takes place by:
Insects or wind
Water currents only
Wind and water
Insects and water
Hydrophyte which does not show hydrophily is?
water hyacinth
Vallisneria
Zostera
Hydrilla
In water hyacinth and water lily, pollination takes place by:
Insects or wind
Water currents only
Wind and water
Insects and water
Exine of pollen grain is made up of
Pectocellulose
Lignocellulose
Sporopollenin
Pollen kit
Water pollinated plant is
All of these
Study the following and find correct option
I. Tapetum nurishes the developing pollen grain
II. Hilum represents the junction between ovule and funicle
III. In aquatic plants such as water hyacinth and lilly pollination is by water
IV. The primary endosperm nucleus is triploid
I and II
I, II and IV
II, III and IV
II and IV
Wind pollinated flowers often have
Single ovule in each ovary
Numerous flowers packed into inflorescence
Both (a) and (b)
None of the above
The process of formation of microspore from the microspore mother cell is called megasporogenesis. The above statement is
TRUE
FALSE
Sometimes (a) and sometimes (b)
Neither (a) nor (b)
What is the role of the silks that emerge from the top of a corn cob?
To protect the developing kernels
To attract pollinators
To provide nutrients to the kernels
To receive pollen for fertilization
