Question

the four main parts of a flower are the ______.
a. sepal, pistil, ovary, and stigma
b. pollen, ovary, pistil, and stamen
c. none of these
d. sepal, petal, stamen, and pistil

Explanation:

To determine the four main parts of a flower, we recall botanical knowledge: the four main parts are sepal, petal, stamen, and pistil. Let's analyze each option:

• Option a: Pistil includes ovary and stigma, so listing sepal, pistil, ovary, stigma is redundant (ovary and stigma are parts of pistil), not four distinct main parts.
• Option b: Pollen is a component of the stamen (male gametophyte), ovary is part of pistil, so this list is incorrect.
• Option d: Sepal, petal, stamen, and pistil are the four main parts of a flower (sepals form the calyx, petals form the corolla, stamen is the male reproductive part, pistil is the female reproductive part).
• Option c is incorrect as option d is correct.

Answer:

d. sepal, petal, stamen, and pistil