Carpels usually have three parts: a _________________ that catches pollen grains, a _______________ that elevates the first part, and an _______________ where megaspores are produced. In this last part, there are placentae that bear small structures called _______________ each with a short stalk called a funiculus and a central mass of parenchyma called the nucellus. One cell in the nucellus will be the _______________ mother cell or ___________________.