Which term describes the tissue that nourishes a seedling prior to photosynthesis?

Which term describes the tissue that nourishes a seedling prior to photosynthesis?

• A. Cotyledon
• B. Endosperm
• C. Germination
• D. Petal

Answer: (B)

Endosperm nourishes the embryo before it can perform photosynthesis. This triploid tissue forms after fertilization and stores nutrients such as starches, fats, and proteins. During germination, the endosperm provides the energy and building blocks the developing seedling needs until its first leaves can photosynthesize. In seeds where endosperm is reduced or absent, the cotyledons may take on nutrient storage after germination, but the initial nourishment prior to photosynthesis comes from the endosperm.

Endosperm nourishes the embryo before it can perform photosynthesis. This triploid tissue forms after fertilization and stores nutrients such as starches, fats, and proteins. During germination, the endosperm provides the energy and building blocks the developing seedling needs until its first leaves can photosynthesize. In seeds where endosperm is reduced or absent, the cotyledons may take on nutrient storage after germination, but the initial nourishment prior to photosynthesis comes from the endosperm.