What are cotyledons? & what is its use

a cotyledon is an embryonic leaf in seed-bearing plants, one or more of which are the first leaves to appear from a germinating seed.

Cotyledons are the first part of a plant to emerge from the seed. They are formed within the seed along with the endosperm. Botanists classify plants based on the number of cotyledons they have. Cotyledons function to provide the initial growth for the plant and as an energy source.

Cotyledon, seed leaf within the embryo of a seed. Cotyledons help supply the nutrition a plant embryo needs to germinate and become established as a photosynthetic organism and may themselves be a source of nutritional reserves or may aid the embryo in metabolizing nutrition stored elsewhere in the seed.

*You Can put this in your own words

"a scientist studying a whale and its surroundings would need to understand the structure of atoms in case something was negatively affecting the whale or its surroundings."

explanation:

this was from the link provided:

1.the evidene of the reaction

2.yes

3.yes