MCQ
The pollination by ........ is called as zoophily.
- AWind
- BWater
- CAnimals
- DNone of the above
Explanation:
Pollination carried by the animals is known as zoophily.
The coloured corolla attracts insects for pollination.
It has sticky pollens which attach to the insect and are transferred from the anther to the stigma of the flower. For example, Arctium.
Pollination carried by the wind is known as anemophily.
It has lighter pollens or winged pollens which are easily carried by the wind. For example, pine.
Pollination carried by water is hydrophilly.
It has lighter pollen which is easily carried by the water currents. For example, hydrilla.
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$A$. The flowers of Vallisneria are colourful and produce nectar.
$B$. The flowers of water lily are not pollinated by water.
$C$. In most of water-pollinated species, the pollen grains are protected from wetting.
$D$. Pollen grains of some hydrophytes are long and ribbon like.
$E$. In some hydrophytes, the pollen grains are carried passively inside water.
Choose the correct answer from the options given below.
$A.$ Variation at genetic level arises due to mutations.
$B.$ Technique of $DNA$ fingerprinting was initially developed by Alec Jeffreys
$I.$ Identification of $DNA$ with desirable genes
$II.$ Gene transfer
$III.$ Maintenance of $DNA$ in host and gene cloning
$IV.$ Introduction of $DNA$ into host to from recombinant $DNA$
Which of the following represents the correct sequence of steps?