The single cotyledon of a maize grain is called:

1. Hypocotyl
2. Scutellum
3. Coleorhiza
4. Embryo

The outermost hard brownish layer of the seed coat is:

1. Testa
2. Tegmen
3. Epicotyl
4. Aleurone layer

Which of the following statement holds true for a maize grain?

1. The maize grain is a ripened ovary containing a single seed.
2. The fruit wall and seed coat are fused together.
3. The outermost layer of the endosperm is rich in protein.
4. All of the above.

The kind of germination in which the cotyledons remain underground is :

1. Viviparous germination
2. Epigeal germination
3. Vegetative germination
4. Hypogeal germination