About two-thirds of human caloric intake consists of a single plant tissue type. Interestingly, a tissue of gymnosperms that plays the analogous functional role of provisioning a seed is also eaten by people. These two tissues are:

Question

Quizplus · Accepted Answer

The tissue type that constitutes about two-thirds of human caloric intake is endosperm, which serves as a nutritional source for the developing embryo in seeds of angiosperms. The tissue of gymnosperms that is also consumed by people and serves a similar function is the female gametophyte or megagametophyte, which contains the haploid nutritive tissue called the prothallus. This tissue supplies nutrients to the developing embryo in the ovule of gymnosperms. Therefore, the correct answer is C (endosperm and female gametophytes).

About Two-Thirds of Human Caloric Intake Consists of a Single