Rhizoids in bryophytes are hair-like structures that act as anchors for the plant, attaching them to the substrate. They absorb water and nutrients from the environment, although not as efficiently as roots in vascular plants.

Here's a breakdown of their functions:

* Anchorage: Rhizoids hold the bryophyte in place, preventing it from being washed away by wind or rain.

* Water and Nutrient Absorption: They absorb water and minerals from the surrounding environment. However, they don't have the same internal vascular system as roots, so their absorption is less efficient.

* Surface Area: Rhizoids can be branched, increasing the surface area available for absorption.

It's important to note that rhizoids are not true roots. They lack the vascular tissue and structural complexity of roots found in vascular plants. This is one of the reasons why bryophytes are restricted to moist environments.