Liverworts, mosses, and hornworts a. lack a sporophyte...

Liverworts, mosses, and hornworts
a. lack a sporophyte generation.
b. grow in dense masses, allowing capillary movement of water.
c. possess xylem and phloem.
d. possess true leaves.
e. possess true roots.

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Key Concepts

Bryophyte Life Cycle

Bryophytes display an alternation of generations where the gametophyte is the dominant, long-lived stage and the sporophyte is typically short-lived and dependent on the gametophyte. This biological cycle is fundamental to understanding how these non-vascular plants reproduce and disperse.

Non-Vascular Plant Structure

Bryophytes are characterized as non-vascular plants, meaning they lack specialized tissues such as xylem and phloem for transporting water and nutrients. This absence necessitates alternative strategies like capillary action to move fluids within the plant body.

Absence of True Roots and Leaves

Instead of true roots and leaves, bryophytes have simpler structures: they use rhizoids to anchor themselves and absorb water, and they possess leaf-like structures that do not exhibit the complex tissue organization found in true leaves. These simplifications are key adaptations to their often moist environments.

Water Movement by Capillary Action

Due to the lack of vascular tissue, bryophytes rely on the close packing of their cells and tissues to facilitate water movement by capillary action. This mechanism is critical for their survival, allowing them to effectively distribute water throughout their simple structures.

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