Question

Why do non-vascular plants need moisture?

Answer 1

Lack of vascular tissue that requires to maintain close contact with water to prevent desiccation.

Explanation:

1. The plant body that is most obvious in non-vascular plants are the the gametophyte generation. The gametophte gemeration is haploid.
2. The non-vascular plants grow in moist environments. It is due to lack of vascular tissue that requires to maintain close contact with water to prevent desiccation.