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11 grade biology others

Write the characteristics of the plants belonging to division bryophyte.

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1 Year agoGrade
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1 Year ago

Bryophytes are a division of non-vascular plants that includes mosses, liverworts, and hornworts. Here are some characteristics of plants belonging to the division Bryophyta:

Non-Vascular: Bryophytes lack vascular tissues (xylem and phloem), which are responsible for the transport of water, nutrients, and sugars in higher plants. Instead, they rely on diffusion and osmosis to move water and nutrients within their bodies.

Small Size: Most bryophytes are small in size, typically ranging from a few millimeters to a few centimeters in height. They lack true roots, stems, and leaves, although some may have structures that perform similar functions.

Haploid Dominance: The life cycle of bryophytes exhibits a dominance of the haploid phase. This means that the gametophyte (haploid) generation is the dominant and independent phase of the life cycle, while the sporophyte (diploid) generation remains dependent on the gametophyte.

Moisture-Dependent: Bryophytes require water for sexual reproduction as the sperm of these plants swim through water to reach the egg. Additionally, they are highly sensitive to desiccation and are typically found in moist environments, such as damp soil, rocks, or tree bark.

Reproduction: Bryophytes reproduce via spores produced in sporangia. These spores develop into gametophytes, which produce gametes (sperm and eggs) in specialized structures. After fertilization, a sporophyte grows from the zygote and remains attached to the gametophyte.

Ecological Role: Bryophytes play crucial ecological roles, particularly in habitats like forests and wetlands. They stabilize soil, retain moisture, and contribute to nutrient cycling. They also provide habitats and food sources for various organisms.

Limited Height: Due to their lack of vascular tissues, bryophytes have limited ability to transport water and nutrients vertically. Therefore, they usually grow close to the ground and do not attain significant height.

Sensitive to Pollution: Bryophytes are sensitive indicators of environmental pollution. Their presence or absence, as well as their health and diversity, can reflect the quality of the air and water in their surroundings.

Overall, bryophytes represent an ancient and diverse group of plants that have adapted to survive in a wide range of habitats, often playing critical roles in ecosystem functioning despite their small size and simple structure.