The correct answer is d. Synergids, Zygote and Primary endosperm nucleus.

Here's the step by step explanation:

1. Synergids: These are haploid in nature. In angiosperms, the embryo sac (female gametophyte) contains two synergids. These are located at the micropylar end of the embryo sac and play a crucial role in guiding the pollen tube towards the egg.

2. Zygote: This is diploid. After fertilization, the fusion of the sperm cell (from the pollen tube) and the egg cell in the embryo sac gives rise to the zygote. The zygote is the first cell of the new plant and is diploid, meaning it contains two sets of chromosomes, one from each parent.

3. Primary Endosperm Nucleus (PEN): This is triploid. The second fertilization event in angiosperms involves the fusion of the second sperm cell with the two polar nuclei located in the central cell of the embryo sac. This fusion produces the triploid primary endosperm nucleus. The primary endosperm nucleus develops into the endosperm, which provides nourishment to the developing embryo.

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The correct answer is d. Synergids, Zygote and Primary endosperm nucleus.

Here's the step by step explanation:

1. Synergids: These are haploid in nature. In angiosperms, the embryo sac (female gametophyte) contains two synergids. These are located at the micropylar end of the embryo sac and play a crucial role in guiding the pollen tube towards the egg.

2. Zygote: This is diploid. After fertilization, the fusion of the sperm cell (from the pollen tube) and the egg cell in the embryo sac gives rise to the zygote. The zygote is the first cell of the new plant and is diploid, meaning it contains two sets of chromosomes, one from each parent.

3. Primary Endosperm Nucleus (PEN): This is triploid. The second fertilization event in angiosperms involves the fusion of the second sperm cell with the two polar nuclei located in the central cell of the embryo sac. This fusion produces the triploid primary endosperm nucleus. The primary endosperm nucleus develops into the endosperm, which provides nourishment to the developing embryo.

Knowee AI · Accepted Answer

The correct answer is d. Synergids, Zygote and Primary endosperm nucleus.

Here's the step by step explanation:

1. Synergids: These are haploid in nature. In angiosperms, the embryo sac (female gametophyte) contains two synergids. These are located at the micropylar end of the embryo sac and play a crucial role in guiding the pollen tube towards the egg.

2. Zygote: This is diploid. After fertilization, the fusion of the sperm cell (from the pollen tube) and the egg cell in the embryo sac gives rise to the zygote. The zygote is the first cell of the new plant and is diploid, meaning it contains two sets of chromosomes, one from each parent.

3. Primary Endosperm Nucleus (PEN): This is triploid. The second fertilization event in angiosperms involves the fusion of the second sperm cell with the two polar nuclei located in the central cell of the embryo sac. This fusion produces the triploid primary endosperm nucleus. The primary endosperm nucleus develops into the endosperm, which provides nourishment to the developing embryo.

In angiosperm, the haploid, diploid and triploid structures ofa fertilized embryo sac sequentially are:a. Synergids, antipodals and Polar nucleib. Synergids, Primary endosperm nucleus and zygotec. Antipodals, synergids, and primary endosperm nucleusd. Synergids, Zygote and Primary endosperm nucleus

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