Final answer:
True, the carpel is a modified leaf that is rolled into a tube, forming part of the flower's female reproductive organ, the gynoecium, which includes the stigma, style, and ovary.
Step-by-step explanation:
True or False: A carpel is a modified leaf that is rolled into a tube.
This statement is true. The carpel is the innermost whorl of a flower and is part of the female reproductive structures. Each carpel consists of three main parts: the ovary which is the large bottom part where the ovules are contained, the style which is a tube-like structure through which the pollen tube grows, and the stigma which is the sticky surface that catches pollen.
The carpel or carpels together form what is known as the gynoecium, and they generally consist of an enlarged base (the ovary) with the style emerging from the top. The flower, in turn, is a highly modified stem with components that are thought to represent modified leaves, which include the reproductive structures such as carpels and stamens, as well as the petals and sepals.