As is true of the gametophytes of all land plants, the gametophytes of true mosses lack stomata. Yet, the feather moss Pleurozium harbors nitrogen-fixing cyanobacteria. Which of the following is a feature of moss gametophytes that is most important for the continued survival of these cyanobacteria in the tissues of the feather moss gametophyte?
A) lack of cuticle
B) lack of vascular tissues
C) lack of true leaves or roots
D) lack of an independent sporophyte
E) lack of multiple cell layers in "leaves" of "buds"
Pollen from a variety of common plants
Plants
Plants
Plants
A land snail (Helix aspersa) with the opening that leads to its lung visible at the left.
Flowering plants such as papayas hold on to their spores and disperse by releasing seeds enclosed in