Written by Merel Dagher (PEACE Advisor)
One of the differences between monocots and “dicots” is the fate of the endosperm. Describe the ploidy and what happens in these different types of flowers.
a. Ploidy: 3n, as a result of the sperm fertilizing the two polar nuclei; in monocots, the endosperm is absorbed by the cotyledon
b. Ploidy: 2n, as a result of the sperm fertilizing the egg; in dicots, the endosperm is absorbed by the cotyledon.
c. Ploidy: 3n, as a result of the sperm fertilizing the two polar nuclei; in dicots, the endosperm is absorbed by the cotyledon
d. Ploidy: 2n, as a result of the sperm fertilizing the egg; in dicots, the endosperm is absorbed by the cotyledon.
a. Ploidy: 3n, as a result of the sperm fertilizing the two polar nuclei; in monocots, the endosperm is absorbed by the cotyledon
b. Ploidy: 2n, as a result of the sperm fertilizing the egg; in dicots, the endosperm is absorbed by the cotyledon.
c. Ploidy: 3n, as a result of the sperm fertilizing the two polar nuclei; in dicots, the endosperm is absorbed by the cotyledon
d. Ploidy: 2n, as a result of the sperm fertilizing the egg; in dicots, the endosperm is absorbed by the cotyledon.
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The correct answer is c. The ploidy of the endosperm is 3n as a result of one of the sperm fertilizing the polar nuclei; in dicots, the endosperm is eaten by the growing cotyledons as a source of nutrients; in monocots, the endosperm is visible, however the cotyledon also uses it for nutrients.