Embryo structures in non-endospermic seeds form the adult plant

Steps:

• Locate the embryo in the non-endospermic seed diagram, which lacks endosperm and relies on cotyledons for nutrition.
• Identify the plumule as the shoot apical meristem within the embryo.
• Identify the radicle as the root apical meristem within the embryo.
• Confirm that these meristems differentiate into the shoot and root systems of the adult plant during germination.

Why C is correct:

• The plumule (2) develops into the shoot system and the radicle (3) into the root system, as defined by embryonic development in angiosperm seeds.

Why the others are wrong:

• A: Structure 1 is the testa (seed coat), a protective layer that withers post-germination.
• B: Structure 1 is the testa, and 4 is likely the micropyle, neither contributing to plant growth.
• D: Structure 4 is the micropyle or hilum, a non-developmental scar.

Final answer: C