AP BIOLOGY

Detailed explanation-1: -Ferns, club mosses, horsetails, and whisk ferns are seedless vascular plants that reproduce with spores and are found in moist environments.

Detailed explanation-2: -Horsetail has several distinguishing characteristics. One such characteristic is horsetail’s hollow stems (Figures 1 and 3). Its stems also are jointed, can easily be separated into sections, and have siliceous ridges that make it rough to the touch.

Detailed explanation-3: -The hollow, jointed, stems of equisetum are the plant structure familiar to most people. Equisetum species found in other continents have similar growth habits that reach heights of 25 feet.

Detailed explanation-4: -Field Horsetail (Equisetum arvense L.) Two types of stems grow annually from dark, creeping, brown-woolly, tuber-bearing rootstocks (rhizomes). Tan-col-ored fertile stems emerge in early spring and reach a height of 1 foot.