What families can angiosperms be divided into

Poaceae, Fabaceae, Asteraceae, Liliaceae, Rosaceae, Ranunculaceae, Orchidaceae, Lamiaceae, Shellaceae, Cucurbitaceae,

1.30,000 species of Asteraceae ; 2.20,000 species of orchids; 3.

18,000 species of legumines; 4.10,000 species of Poaceae; 5.8,000 species of Euphorbiaceae; 6.

6,000 species of Rubiaceae; 7.4,000 species of sedges; 8.3,500 species of Lamiaceae; 9.

3,300 species of Rosaceae; 10.There are 3,200 species in the cruciferous family.

Angiosperms are divided into monocots and dicots.

The fundamental difference between them lies in the number of cotyledons. We can judge whether the plant belongs to monocots or dicots according to the expression of the number of tail tubes at the root of the leaves of the plant, and the number of petals. So what kind of plants do they belong to?

I'm sure you already have your own answer. Notes time, raccoledon is a dicot plant, in addition to the leaves used for photosynthesis, its roots, and the cyst responsible for catching small creatures. Its peculiarity lies in its ability to prey on insects.

There are many varieties of angiosperms. Most of the flowering plants we see in our daily lives are angiosperms. Rice is the fruit of rice, and the structure from the outside to the inside is the endosperm embryo of the peel seed coat.

The rice we eat daily is the endosperm part of the rice fruit. The betel nut fruit consists of the peel and seeds. The betel nut that people eat is a small piece of betel nut made by pitting the fruit and adding other raw materials, which belongs to a class of carcinogens.

Regularly addressing betel nut can easily increase the risk of oral cancer. The fruit of Sihuai is a false fruit, the skin is brown, and there are black-brown seeds in each false fruit, and the fruit of the peony is a five-pointed star. Each corner contains many large black seeds.

Angiosperms are divided into monocots and dicots.

The leaf veins of monocots are often parallel veins, the flower leaves are basically 3 numbers, and the embryo of the seed has 1** leaves. Dicotyledonous leaves have reticulated veins, flowers are usually 5 or 4 bases, and the embryo of the seed has 2 cotyledons. Angiosperms are the most evolutionary, diverse, widely distributed and adaptable group in the world today.

Angiosperms have a very close relationship with humans, and there are more than 300 kinds of fruit trees; There are countless flowers and plants. Angiosperms, named in plant taxonomy, are named the subphylum Angiosperms, which are the largest group in the plant kingdom. Monocots form a monophyletic group, called a monocotyledon branch, which is a specialized branch of dicots, which makes the traditional dicot classification a paronymous group and no longer considered a valid taxonomy.

Introduction to angiosperms

Angiosperms are the most evolutionary, diverse, widely distributed and adaptable group in the world today. It is known that there are more than 200,000 species of angiosperms in the world, accounting for more than half of the total number of plants. There are more than 2,700 genera and more than 30,000 species of angiosperms known in China.

Angiosperms have a very close relationship with human beings, such as more than 2,000 species of angiosperms in China that can provide food; There are more than 300 species of fruit trees; There are countless flowers and plants. There are 10,027 species of medicinal angiosperms (including taxonomic units below species), accounting for 90% of the total number of medicinal plants in China, and it is the group with the largest number of medicinal species, and most of the traditional Chinese medicine comes from angiosperms.

Dicotyledons: Roots--- straight root system.

Monocots: Rhizomes --- fibrous root systems.

Dicotyledons: Stems --- vascular Cambodians arranged in a ring, with cambium.

Monocots: Stems --- vascular bundles arranged in stellar clusters without cambium.

Dicotyledons: The leaf --- have reticular veins.

Monocots: The leaf --- have flat or arcuate veins.

Dicotyledons: The base number of each part of the flower --- is 4 or 5

Monocots: The base number of each part of the flower --- is 3

Dicotyledons: pollen grains --- with 3 germination pores.

Monocots: pollen grains --- with a single germination pore.

Dicotyledons: embryonic --- with 2** leaves.

Monocots: embryonic --- with 1** leaves.

The above differences are not absolute, in fact, there is a staggered phenomenon, such as Ranunculaceae, Plantainaceae, Asteraceae and other fibrous root plants in the dicot class, Pepperaceae, Nymphaeaceae, Ranunculaceae, Caryophyllaceae and other plants with vascular stellar arrangement, Lauraceae, Magnoliaceae, Berberaceae, Ranunculaceae have 3 cardinal flowers, Nymphaeaceae, Ranunculaceae, Apiaceae and other L**leaf phenomena. In the monocot class, there are reticular veins in the Araceae family, Liliaceae family, and dioscaceae family, and there are 4 cardinal flowers in the Eyeliaceae, Liliaceae family, and Centiaceae.

(1) Choripetalae

The subclass Archaela is also known as the archaic perianth subclass (archichlamydeae). These include unanimated, single-flowered or coralyx-separated types, which are distinguished by calyxes and corollas, while the petals are usually separated. The stamens and corolla are detached. Embryonic is generally covered with a layer of beads.

(2) Sympetalae

This subclass, also known as metachlamydeae, is characterized by the number of petals connected into a confluent corolla. The corolla forms various shapes, such as funnel-shaped, bell-shaped, lip-shaped, tubular, tongue-shaped, etc., and develops from radial symmetry to bilateral symmetry. The various joins of the corolla increase the adaptation to insect pollination and the protection of stamens and pistils.

Thus, the zygoteflora evolved over the off-petal flora.

The number of flower rounds tends to decrease, from 5 rounds (calyx L round, petal L round, stamens 2 rounds, pistil carpel L round, such as azaleas, persimmon family, etc.) to 4 rounds (calyx, petals, stamens, carpels are all L rounds, such as Xylophoraceae, honeysuckle, etc.), the number of rounds is also gradually reduced, such as the number of stamens from the same number as the corolla lobes, such as from 5 (Cyclophyllaceae, Solanaceae, Primroses) to 4 2 (Lamiaceae, Cucurbitaceae) The number of carpels is reduced from 5 (Rhododendron family) to 2 (the carpels of the four round flowers are mostly 2).

Usually without a peduncle, the ovules have only one layer of tepal.

Angiosperms, also known as green flowering plants, are known to have more than 10,000 genera and more than 200,000 species, accounting for half of the plant kingdom, and there are more than 2,700 genera and about 30,000 species in China.

Angiosperms are of many species and are extremely adaptable. In particular, the structure of the reproductive organ and the characteristics of the reproductive process provide it with the internal conditions for adapting to and resisting various environments, so that it can constantly produce new mutations and new species in the cruel struggle for the survival of the fittest, and survive in the cruel law of the jungle, and continue to <>

Angiosperm phylum represents the plant: magnolia.