Which plant group is called 'amphibians' of the plant world ?

Why are bryophytes called 'amphibians of the plant world'?

Which of the following plant groups is known as amphibians of the plant body ?

Amphibians of the plant kingdom are

Bryophytes called amphibians of plant kingdom as

Why bryophytes are called amphibians of the plant kingdom ?

Which group of plants are called amphibians of plant kingdom ? Name the branch of Botany which deals with them.