Pollination in Angiosperms

The act of transferring pollen grains from the male anther of a flower to the female stigma.

When pollen from a plant’s anther is transferred to the stigma of the same plant.

Transfer of pollen from the anther of a flower to the stigma of the same flower.

<p>Transfer of pollen from the anther of a flower to the stigma of another flower on the same plant.</p> Signup and view all the answers

<p>When pollinators are scarce or in homogamous flowers.</p> Signup and view all the answers

<p>Flowers with sexual structures that are small, inconspicuous, and enclosed by the petals.</p> Signup and view all the answers

<p>No diversity in gene, pure gene/race maintained. Not dependent on external factors for pollination. Avoids wastage of pollen grains.</p> Signup and view all the answers

<p>New genes are introduced, improves resistance to diseases, good vigour and vitality, only way for unisexual plants to reproduce</p> Signup and view all the answers

<p>High wastage of pollen grains, elimination of good quality pollen, low quality pollen may pollinate</p> Signup and view all the answers

<p>Reduces vigour and vitality. Reduced immunity. No new characters or features are introduced into the new offspring.</p> Signup and view all the answers

<p>Cross-pollination is when pollen from one plant's anther is transferred to the stigma of another plant. An example of an agent is insects.</p> Signup and view all the answers

<p>Fertilization is the fusion of male and female gametes to form a zygote, involving the growth of a pollen tube to transport male gametes to the ovule.</p> Signup and view all the answers

<p>Hydrophilous, Zoophilous, Anemophilous, Entomophilic.</p> Signup and view all the answers

<p>The flower is the reproductive organ responsible for producing seeds through sexual reproduction.</p> Signup and view all the answers

<p>The haploid gametophyte alternates with the diploid sporophyte.</p> Signup and view all the answers

<p>They are pollinated by water. Flowers are small, inconspicuous, with no fragrance, and pollen can float in water.</p> Signup and view all the answers

<p>Egg, polar nuclei, sperm cells</p> Signup and view all the answers

<p>Entomophilic flowers are pollinated by insects. They are attractive with bright petals, have fragrance, and secrete nectar.</p> Signup and view all the answers

<p>Double fertilization is the process by which two male nuclei in the pollen tube fuse with two different types of nuclei of the same ovule to produce two different structures.</p> Signup and view all the answers

<p>The endosperm is the plant embryo's food source that the young plant will consume until the roots have developed after germination.</p> Signup and view all the answers

<p>Syngamy is the fusion of the sperm cell with the egg cell to form a diploid zygote (2n).</p> Signup and view all the answers

<p>The endosperm is triploid (3n).</p> Signup and view all the answers

<p>In diploid cells, one set of chromosomes comes from the male parent and the other set comes from the female parent.</p> Signup and view all the answers

<p>A seed consists of the external seed coat, the embryo, and the endosperm.</p> Signup and view all the answers