The small class on evil has begun.

Because I want to write about the cell wall next, I have to add knowledge to avoid the brain miserable child spraying me.

The biggest difference between animals and plants is that animals cannot have chloroplasts and cell walls at the same time.

Taxonomy has been enriching and changing as scientists study biological knowledge.

For example, around 2010, blue-green algae were renamed cyanobacteria, and termites were identified as a type of cockroach. [It's true.] Interested readers can search for it. 】

The two major taxonomic levels of animals and plants have not been strongly questioned, but there are still some small dark clouds floating in the taxonomic sky. [Referring to the taxonomy encountered negative doubts and countless keyboard warriors. 】

In order not to form a storm, taxonomists decided to manually erase these dark clouds.

Plant taxonomy moves are relatively fast, and they expelled from the plant kingdom everything that could not be explained in their taxonomic theories, in the form of the fact that certain organisms were not included in the publication of taxonomic works.

If their expulsion of prokaryotes and fungi resonates partially, their expulsion of certain algae is a bit odd.

Why do botanists expel some algae from plant registration?

Because these algae are a bit like animals. For example, euglena, also known as euglena, are single-celled organisms that do not have a cell wall, have chlorophyll, and can be autotrophic. At the same time, there are flagella that are able to move around.

Embarrassing! Slap it in the face! Ordinary people are accustomed to using the cell wall as a distinction between animals and plants, but how to explain the euglena?

There is also a species that once challenged the notion that animals have a cell wall.

It is defined as dinoflagellates, which is clearly the name of the plant. Due to its flagellar structure and ability to swim, it was also once classified as an animal.

Dinoflagellates, single-celled organisms, are also known as diflagellates.

Most of them have armor-like cell walls that contain chlorophyll and a variety of carotenoids, and are autotrophic. Hence it was considered a plant at first.

But dinoflagellates have 1-3 flagella. Usually there are two, one with a long flagella backward and the other is called a lateral hair.

Flagella emerge from the flagellar pores of the outer wall of the cell. The lateral flagellar spiral wave provides most of the propulsion. The flagella act mainly as rudders and rarely provide propulsion.

The scientific community published a study in 1997 that showed a dinoflagellates that hunt in the field.

Its report elaborates on four points.

1. The abdomen of the Berlin polydinoflagellates is close to an injured nematode.

2. It can release the capture wire.

3. Use the esophagus to suck (due to the deformation of the upper body of the cell due to the pressure).

4. Leave the ingested nematode (there are still remnants of the capture silk).

In 2000, another scientist discovered another heterotrophic form of dinoflagellates, which use a cage structure to hunt.

Even dinoflagellates can use flagella to create water currents in localized areas to prey on bacteria.

All this shows that dinoflagellates have the characteristics of animals: they can move on their own.

★ So readers can see that scientists say that animals don't have cell walls because those taxonomists have expelled animals with cell walls. ★

Taxonomy is influenced by both socio-cultural and inadequate discoveries in its own disciplines. Not only for the academic community itself, but also for the public.

For example, in 2018 and 219, they liked to hype ☞ that kelp was not classified as a plant, but they were afraid to admit openly that the taxonomic community had expelled paramecium as early as 2005.

From the point of view of biological physiology and biological evolution. Certain algae may be the common ancestors of animals and plants.

The animal ★ algae, which maintained the cell wall, ★ eventually landed and evolved into various plants.

Some primitive algae had some endosymbiotic effects with bacteria in the ocean, and eventually lost their cell walls, which made the evolution of animal cells more possible, and thus evolved animals.

The flagellar algae described above may confirm this hypothesis.

However, the reality is that their unique physiology makes their taxonomic position so awkward, and it also distorts other known species classifications. [On the evil spread of hands, indicating manual funny. 】

It is not necessarily a plant that has chloroplasts, such as the green leaf sea snail or the green leaf sea beetle.

But no matter what, Shangevil is still a melon-eating audience.

The view of the upper evil is that plants with chloroplasts and cell walls can be called plants.