The colorless root like projections of mosses, liverworts, and hornworts, which anchor them to the substrate are called

Rhizoids

Explanation:

Mosses, liverworts, and hornworts are three groups of a division of plants called BRYOPHYTA. These division of plants are referred to as "lower plants" because of their primitive features. They are non-vascular i.e they do not possess vascular conducting tissues e.g xylem, phloem etc.

In addition to this, bryophytes (mosses, liverworts, and hornworts) do not have true roots and leaves like other plants. Instead, they possess colorless root like projections called RHIZOIDS, which they use to anchor themselves to the substrate and absorb water.

i'd say that the moon rock is about 2.2 billion years old.

the answer is "a.) well–developed vascular system."

explanation: