Bryophytes have the habit of growing densely, which is of great significance for environmental prote

1. Morphological characteristics.

The roots are small and the leaves are large, and some plants have stems, and some only have stems and leaves, which are suitable for living in a humid and semi-shady environment and reproducing offspring by spores.

2. Ecological habits.

In some mosses and hornlitatis, mature gametophytes are slightly flattened or very flattened (protophytes) and often cling to the substrate. The gametophyte of most bryophytes is often fixed to the substrate with filamentous pseudoroots; False roots are mainly sessile organs and have an absorption effect. Sporophytes are usually annual and are attached to gametophytes to varying degrees to absorb nutrients and water.

There are sporophytes on the stem-like structure of the sporophyte, and the spores are dispersed from the sporophytes. After the spore germinates, gametophytes are formed – flaky phyllophytes or stem-leaf bodies with stem-leaf differentiation, and the sporophytes develop on the gametophytes. Bryophytes can also reproduce vegetatively through fragments of gametophytes or specialized cells that sprout and germinate like spores.

3. Life history characteristics.

Bryophytes have hard, thick stems and leaves, do not flower, have no seeds, and reproduce with spores. It is widely found throughout Africa, from deserts to the tropics, and is most abundant in humid and semi-shady environments, but there are no marine people, and they are very tolerant of long-term wet and freezing conditions.

Bryophytes are a kind of small green plants with gametophytes dominating in the life history, with simple structure, no vascular tissue, no real differentiation of roots, stems and leaves.

Bryophytes usually prefer shady and humid environments, generally growing on rock walls, tree trunks and soil surfaces, or in moist forests and swamps, and some bryophytes can also survive in deserts and even deserts. [2]

In the more advanced species, the plant body has the differentiation of false roots and similar stems and leaves. The internal structure of the plant body is simple, the pseudoroot is composed of a single cell or a column of cells, there is no central column, and only in the higher species, there is a cell population similar to the transduction tissue. Although the morphology and structure of bryophytes are so simple, bryophytes still have important biological significance for the study of terrestrial organisms because they have similar stem and leaf differentiation and release spores.

In the evolutionary process of the plant kingdom, bryophytes represent a type that gradually transitions from aquatic to terrestrial.

1. Prevent soil erosion. Bryophytes have a strong ability to absorb water, and grow very densely and rapidly, generally dense clusters, and the water absorption can sometimes reach 15 to 20 times the dry weight, so it has the effect of preventing soil erosion.

2. Promote soil formation. As bryophytes grow, they secrete an acidic substance that dissolves the rock surface and accumulates substances and moisture in the air, prompting the rock surface to gradually form soil. The moss that covers the soil surface also protects the soil by preventing soil erosion.

3. Indication function to detect the degree of air pollution. The leaves of bryophytes are single-celled, and toxic gases can easily invade the leaf cells, resulting in bryophytes being unable to survive. Therefore, based on this sensitive property of bryophytes to toxic gases, observing the growth of bryophytes can be used to detect the air quality of the surrounding environment.

It is often difficult to find them in heavily polluted towns or around factories.

4. Ornamental value. Bryophytes have a unique natural beauty, they grow densely, like a green blanket hanging on the soil, which is very interesting and brings a sense of calm and well-being. Recently, it has also been widely used in landscaping.

Bryophytes.

The structure of selected CA, D, and algae plants is simple, and there is no differentiation of roots, stems and leaves Bryophytes have no roots, and there is differentiation of stems and leaves, and there is no conduction tissue in the body Ferns have the differentiation of roots, stems, and leaves, and there are conduction tissues in the body, and they are generally taller and taller It does not meet the topic

b. Most of the algae plants live in water, a few live in the shady and humid places of the land, and the reproduction of bryophytes and ferns is inseparable from water, and they are suitable for living in the shady and damp places of the land

c. Algae plants, bryophytes, and ferns do not produce seeds, but rely on spores to reproduce offspring, which belongs to spore plants

Choose C, I forgot it too quickly in high school, it should be all spore reproduction, and chlorophyll can be used for photosynthesis. Flip through the book to be sure.

Bryophytes are a class of plants with a simple structure, without real roots, and without conductive tissues and mechanical tissues, gametophytes dominate in the life cycle, sporophytes cannot live independently, and parasitize on gametophytes, which restricts the further development of bryophytes, so it is a more primitive type of plants Ferns are higher than bryophytes, mainly in that the plant body of ferns not only has stems and leaves differentiation, but also has real roots, and there are conductive tissues and mechanical tissues in the body, in the life history, Both sporophytes and gametophytes can live independently, but sporophytes are dominant and are more adapted to terrestrial environments than bryophytes

Therefore, the answer is that compared with bryophytes, the reason why ferns are more adaptable to terrestrial life is because ferns have the differentiation of roots, stems and leaves, and have conductive and mechanical tissues in the body, and sporophytes dominate in reproduction

Pick B. Both are spore reproduction, and spore reproduction is inseparable from water, so b is correct. A false, living in a dark and damp place has nothing to do with not being able to blossom and bear fruit.

Conduction tissues are present in the body of ferns, hence the c-error. Ferns have a differentiation of rhizomes and leaves, hence the d's.