A question about the natural taxonomy of plants

1. There is such a thing. The three families became independent families, and the generalized leguminaceae rose to the leguminous order.

2. The original leguminous family belonged to the order Rosaceae.

3. There are many families under the order Rosaceae. Familiar such as: plane tree, witch hazel, saxifrage, sedum, tung flower, rosaceae and so on. Among them, the saxifrage family was later divided into the tea herbaceae and hydrangea family.

1. None; 2. Legumidae; 3. There is also a cruciferous family. Hope!!!

It depends on which classification system it is used in.

In the Kronqvist, Hutchinson, and Tahtama systems, there was originally a legumin, and it is believed that there is only one family of leguminosae, that is, leguminosae in the broad (narrow) sense. The legume family is divided into 3 (sub)families: mimosaceae, caesalpiniaceae, and papilionaceae.

In the Engler system, leguminosineae, connaracrae, and krameriaceae are divided into rosaceae.

In the APG system, legumes include Fabaceae, Astrophaceae, Marineaceae and Saponaridae.

Taxonomy helps to further identify species and plant evolutionary relationships.

Plant taxonomy is one of the oldest and most comprehensive sub-disciplines of botany. In the past, most of the classical classifications were based on external morphology and internal anatomical features, but later the contents of pollen morphology, geographical distribution and paleontology were combined to further identify species and plant evolutionary relationships. Taxonomy can be defined as the study and description of variation in organisms, the causal relationships of such variation, and the use of information to establish a classification system.

The terms taxonomy and systematic are now used less strictly in conjunction with oak sheds, and if the two terms are to be used in different meanings, then taxonomy is often used to refer to the theory and practice of classification (including its foundations, principles, procedures, and rules) rather than its end product (classification system); Systematics is the study of the types and diversity of organisms and all the relationships between them (Simpson 1961), which is somewhat broader than taxonomy.

It is estimated that there are more than 500,000 species of organisms (about 250,000 species of seed plants) living on the earth. The first step in the study of such a large number of plants and their wide variety of plants is to classify them according to their natural nature, from coarse to fine, from the surface to the inside, otherwise there is no way to start. Plant taxonomy consists of three aspects, and its research object is the plants that live all over the world.

Plant taxonomy is an early development of the discipline, its task is not only to identify species, identify names, but also to elucidate the kinship and classification system between species, and then study the origin, distribution center, evolutionary process and evolutionary trend of species. Therefore, it is a discipline that is both practical and theoretical. In order to classify each plant group, people give it a certain name according to the size and rank of the plant group, which is the hierarchical unit of classification.

Understanding and mastering the hierarchical units (strata) of classification is the basic knowledge that taxonomy must have.

Summary. According to the living environment, plants can be divided into terrestrial plants (such as poplars, willows) and aquatic plants (such as lotuses, water lilies).

How can plants be classified according to their growing environment? Give one example each, and there are two questions in total.

According to the living environment, plants can be divided into terrestrial plants (such as poplars, willows) and aquatic plants (such as lotuses, water lilies).

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The history of biological progression.

Cheng is the structure of du from simple to complex, from aquatic zhi to terrestrial, dao from low to high As shown in the figure, we can see the evolutionary process of Rong plants: primitive algae plants (primitive bryophytes and primitive ferns) primitive seed plants (including primitive gymnosperms and primitive angiosperms), which can be seen in the order from simple to complex: algae plants bryophytes ferns seed plants

So the answer is: algae, mosses, ferns.

Choice C, although cyanobacteria and green algae are of the same level, they belong to different kingdoms, one is the prokaryotic kingdom and the other is the plant kingdom (eukaryotes) b monocots and dicots c gymnosperms and angiosperms, and they belong to the same plant kingdom - brown algae and red algae, and they belong to the same plant kingdom - understand? I did this back then.

Chinese phycologists mostly advocate that algae be divided into 12 phyla: Chrysophyta, Xanthellae, Diatoms, Dinoflagellates, Brown Algae, Red Phytes, Euglena, Chlorella, Rotophyta, Rotophyta, and Cyanobacteria.

Two of the subjects are given in the question, so choose A

Is the answer really c? The proposition should mean that brown algae and red algae belong to the two phyla of the plant kingdom - lower plants - algae: brown algae, red algae; Gymnosperms and angiosperms belong to the two phyla of the kingdom Planta-Higher Plants-Seed Plants:

Gymnosperms, angiosperms. In fact, according to this method, cyanobacteria and green algae also belong to the phylum Cyanobacteria and Chlorophyta of algae, but I don't know if they are "equivalent" (this word is very loose).

There are many ways to classify organisms, and some of the characteristics of algae are also classified into the animal kingdom, and cyanobacteria are more special (cells do not have a real nucleus), and some people demarcate them separately. As for monocots and dicots, they belong to two classes under the phylum Angiosperms.

Think simply, don't think too much, and this question will be easier to answer. From the perspective of plant classification, brown algae and red algae both belong to algae plants, and gymnosperms and angiosperms belong to seed plants. So the relationship is close. So choose the C answer.

From a taxonomic point of view, Brown and Red Phyta, Gymnosperms and Angiosperms, and the others are not corresponding phyla.