Question

ДУЖЕ СРОЧНО (бо в мене вже істерика) 1. Органи статевого та нестатевого розмноження папороті і покрито насінних 2. Наявність видозмін стебла (кореневище) - мохи, папороті і покрито насінні 3. Мохоподібні, папоротеподібні і покритонасінні належать до вищих/нижчих, тому що вони мають...

Answer 1

я не дуже зрозуміла, що саме потрібно зробити?

але:

1. Квітка — це видозмінений нерозгалужений і обмежений у рості пагін, що служить для статевого розмноження покритонасінних рослин. (Генеративні органи).

2. ?

3. Це вищі рослини тому, що у них відсутня провідна система.Також вони складаються з одного типу тканин.

Answer 2

Organs of Sexual and Asexual Reproduction in Ferns and Seed Plants

In ferns, the organs of sexual reproduction are called gametangia. These structures produce and house the gametes, which are the reproductive cells. Ferns have two types of gametangia: the male gametangia, called antheridia, and the female gametangia, called archegonia. The antheridia produce sperm cells, while the archegonia produce egg cells. The fertilization process in ferns involves the transfer of sperm cells to the egg cells, resulting in the formation of a zygote.

On the other hand, seed plants, which include gymnosperms and angiosperms, have specialized reproductive structures. In gymnosperms, such as conifers, the male reproductive organs are called pollen cones, which produce pollen grains containing the sperm cells. The female reproductive organs are called ovulate cones, which contain ovules that house the egg cells. Fertilization in gymnosperms occurs when pollen grains are transported to the ovules, leading to the formation of seeds.

In angiosperms, the male reproductive organs are located in the flowers and are called stamens. The stamens consist of a filament and an anther, which produces pollen grains. The female reproductive organs are also located in the flowers and are called carpels. The carpels consist of an ovary, a style, and a stigma. The ovary contains ovules, which house the egg cells. Fertilization in angiosperms occurs when pollen grains land on the stigma and grow a pollen tube to reach the ovules, resulting in the formation of seeds.

Presence of Stem Modifications (Rhizomes) in Mosses, Ferns, and Seed Plants

Mosses, ferns, and seed plants can exhibit stem modifications known as rhizomes. A rhizome is an underground stem that grows horizontally and gives rise to new shoots and roots. It serves as a storage organ for nutrients and allows plants to spread and colonize new areas.

Mosses, which are non-vascular plants, can have rhizoids that resemble roots but are not true roots. These rhizoids anchor the moss to the substrate and absorb water and nutrients.

Ferns, which are vascular plants, can have rhizomes that grow horizontally underground. These rhizomes produce fronds (leaves) and roots, allowing ferns to spread and form new individuals.

Seed plants, including gymnosperms and angiosperms, can also have rhizomes. For example, some grasses have rhizomes that grow horizontally underground, enabling vegetative propagation and the formation of new shoots and roots.

Classification of Mosses, Ferns, and Seed Plants

Mosses, ferns, and seed plants (gymnosperms and angiosperms) belong to different groups in the plant kingdom.

Mosses, which include the group Bryophyta, are non-vascular plants. They lack specialized tissues for transporting water and nutrients and are typically found in moist environments. Mosses reproduce through spores and have a dominant gametophyte generation.

Ferns, which belong to the group Pteridophyta, are vascular plants. They have specialized tissues for conducting water and nutrients and are commonly found in damp habitats. Ferns reproduce through spores and have a dominant sporophyte generation.

Seed plants, which include gymnosperms and angiosperms, are also vascular plants. They have well-developed vascular tissues and are found in a wide range of habitats. Seed plants reproduce through seeds, which contain the embryo and a food source. Gymnosperms, such as conifers, have naked seeds, while angiosperms have seeds enclosed within fruits.

Therefore, mosses, ferns, and seed plants are classified into different groups based on their reproductive structures, stem modifications, and overall characteristics within the plant kingdom.