Question

-and-are the essential whorls of a flower

Answer 1

The outermost whorl of the flower has green, leafy structures known as sepals. The sepals, collectively called the calyx, help to protect the unopened bud. The second whorl is comprised of petals—usually, brightly colored—collectively called the corolla.

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Answer 2

Answer:

Androecium and gynoecium are the essential whorls of the flower.

Calyx and Corolla are the non essential whorls of the flower.