Which of the following structures is not present in the embryo of monocots?
Cotyledons.
Radicle.
Hypocotyl.
Epicotyl.
Monocots have embryos with only one cotyledon, so it is not correct to say that cotyledons are not present in the embryo of monocots. Therefore, option A is incorrect.
On the other hand, the radicle, hypocotyl, and epicotyl are present in the embryo of monocots. The radicle is the embryonic root that emerges first during germination and develops into the root system of the plant. The hypocotyl is the region of the stem below the cotyledon that connects the root system and the shoot system. The epicotyl is the region of the stem above the cotyledon that gives rise to the leaves and the upper portion of the stem.
Option a is the correct answer.