Anthoceros is the correct answer. Pseudoelaters are specialized multicellular structures in hornworts that aid spore dispersal, unlike true elaters in liverworts.

Option Breakdown

Riccia

Riccia, a liverwort, lacks elaters or pseudoelaters in its sporangium; instead, it has nurse cells that nourish spores.

Marchantia

Marchantia, another liverwort, contains true elaters—single-celled, spiral-thickened structures for hygroscopic spore dispersal—not pseudoelaters.

Anthoceros

Anthoceros (hornwort) features pseudoelaters: elongated, thin-walled, multicellular filaments that split lengthwise, twist with moisture changes, and propel spores.

Sphagnum

Sphagnum (moss) has no elaters or pseudoelaters; its capsule wall aids spore release around a columella, without dispersal structures.

Introduction

Pseudo elaters are found in Anthoceros, a key hornwort bryophyte, distinguishing it from Riccia, Marchantia, and Sphagnum. These structures enhance spore dispersal in damp habitats, vital for bryophyte reproduction.

What Are Pseudo Elaters?

Pseudo elaters are multicellular, filamentous cells in Anthoceros sporophytes that lack spiral thickenings unlike true elaters. They mature by splitting lengthwise and respond to humidity by twisting, flinging spores outward.

Role in Bryophytes

In hornworts like Anthoceros, pseudo elaters surround spores and columella in the capsule, aiding dispersal without true elater bands. This adaptation suits their horn-like sporophytes growing from thalli.

Comparison Table