PLANTS
PLANT REPRODUCTION
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Unlike other plants, angiosperms require water for fertilization to take place.
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Angiosperms are the only plants to produce seeds after fertilization takes place.
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In angiosperms, a sperm fuses with an egg to produce a zygote.
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Two fertilization events take place in angiosperms, producing a zygote and endosperm.
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Detailed explanation-1: -Pollination helps the pollen grains to reach stigma via style. The two sperm cells enter the ovule-synergid cell. This proceeds to fertilization. In angiosperms, fertilization results in two structures, namely, zygote and endosperm, hence the name “double fertilization.”
Detailed explanation-2: -Fertilization is much different with angiosperms than compared to other plant organisms because these plants perform double fertilization. Double fertilization occurs when pollen hits the stamen, or female part of a plant.
Detailed explanation-3: -Two male gametes are released from the pollen tube. The zygote is formed when one male gamete fertilizes the egg ( syngamy). A triploid main endosperm nucleus is formed when the other male gamete joins with the central cell’s two polar nuclei.
Detailed explanation-4: -1: Double fertilization: In angiosperms, one sperm fertilizes the egg to form the 2n zygote, while the other sperm fuses with two polar nuclei to form the 3n endosperm. This is called a double fertilization.
Detailed explanation-5: -This is called double fertilization because the true fertilization (fusion of a sperm with an egg) is accompanied by another fusion process (that of a sperm with the polar nuclei) that resembles fertilization.