In seed plants, which structure contains the plant embryo?

• A. Pollen grain
• B. Anther
• C. Stigma
• D. Seed

Answer: (D)

Verified step by step guidance

1. Understand the life cycle of seed plants, which includes the formation of seeds after fertilization.
2. Recognize that the plant embryo is the young multicellular organism that develops from the fertilized egg within the seed.
3. Identify the structures listed: pollen grain (male gametophyte), anther (part of the stamen producing pollen), stigma (part of the pistil receiving pollen), and seed (the mature ovule containing the embryo).
4. Recall that the pollen grain carries sperm cells but does not contain the embryo itself.
5. Conclude that the seed is the structure that contains the plant embryo, as it develops from the fertilized ovule and houses the embryo along with stored nutrients.