Final answer:
The group of plants that lacks vascular tissues and true roots, stems, and leaves are bryophytes, which includes mosses, hornworts, and liverworts. The correct answer to the question is (a) Mosses.
Step-by-step explanation:
The group of plants that typically lacks vascular tissues and true roots, stems, and leaves are the bryophytes. This category includes mosses, hornworts, and liverworts. Bryophytes are characterized by their small size due to their nonvascular nature, which means they lack specialized structures such as true roots, stems, and leaves for transporting water and nutrients. Instead, they absorb water and nutrients directly across their surface.
They tend to live in moist environments to cope with this limitation as they require water for reproductive processes. Bryophytes reproduce via spores rather than seeds, which is why they are also referred to as seedless nonvascular plants.
Considering the options provided: (a) Mosses, (b) Seed Plants, (c) Both a and b, and (d) None of the above; the correct answer is (a) Mosses.