Heterosporous plants produce __________.

Which is a key difference between alternation of generations in plants and sexual reproduction in nonplant organisms?

Which term is most nearly synonymous with land plants?

A major division in plant systematics is based on whether a particular species has __________.

What structures allow plants to readily take up carbon dioxide from the atmosphere?

Ferns and mosses are limited mostly to moist environments because __________.

Three of the following are evidence that charophytes are the closest algal relatives of plants. Select the exception.a. similar sperm structureb. the presence of chloroplastsc. similarities in cell wall formation during cell divisiond. genetic similarities in chloroplasts

In this abbreviated diagram, identify the four major plant groups and the key terrestrial adaptation associated with each of the three major branch points.

What important role does lignin play in vascular plants?a. It is the major component of the cuticle, which prevents plants from drying out.b. It forms the outer layer of pollen grains.c. It forms the tough, rigid cell walls of water-conducting cells.d. It nourishes the embryo in seed plants.