What are the simplest ?
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simplest organisms are found on the Earth's surface.They are found as mountain tops or on the ocean floor.Pathfinder is a simple Dutch naturalist Antonie van Leeuwenhoek.He made the first description of red blood cells, as well as watching the bacteria.Later, in the 18th century microscopists did description and sketched dozens of species of protozoa.In this article we will talk about what are the types of protozoa (single-celled) organisms.
Microorganisms having in its structure a single cell, called protozoa.Such a cell can contain as one or more cores double membrane envelope.The main feature of the simplest is that a cell is able to independently carry out all necessary life-sustaining functions.Namely:. Ensure that the processes of respiration, nutrition, reproduction, movement, etc. This differs from simple multicellular organisms, where one cell can only perform one or more specific functions.
Reproduction simplest possible in two ways: sexually and asexually.In sexual reproduction, two merge into one organism (the zygote), which continues to reproduction, but asexually.In asexual reproduction nucleus divides into two or more parts.Cytoplasm, in turn, is divided into the number of parts, which are divided on the core.As a result, the formation of new elementary respectively two or more.
Virtually all elementary can be seen only with a microscope, as their size ranges from 10 to 40 micrometers.In that case, if they are up to several millimeters (large ciliate), you will be able to see with their own eyes.
Habitat simplest diverse.They may be in the soil, water, humans.
simply can exert both positive and negative effects on the environment.For example, simply can eat decaying substances in the water, thereby purifying it.However, getting into the human body, parasitic protozoa cause serious diseases.
What are the simplest?
There are over 25 thousand. Kinds of protozoa.Consider the most common representatives.
It lives exclusively in water, and it does not matter, it's a lake or a dewdrop.Without moisture dries instantly amoeba.It reacts to external stimuli, such as: a bright light mechanical action.Moves using prolegs.The speed of movement of about 0.2 millimeters per minute.Reproduce asexually.
Like Amoeba Proteus, lives in the water.Its shape can be modified to become wider and shorter.green chloroplasts are a part of the cells that give it color.But if you put it in the darkness, euglena loses its color and becomes colorless.The movement is carried out by means of flagella.Euglena Propagated by dividing in half (asexual process).
representatives of this class are moved via prolegs.In connection with their presence simplest form is fickle.Duplication is possible only asexually.Many sarkodovyh are parasites.They live in the water, moist soil.
lack of organelles to travel is their distinguishing feature from the representatives of other classes.Reproduction occurs both sexually and asexually.Absolutely all representatives Sporozoa - parasites.The representative of the class Sporozoa - Plasmodium falciparum.
Movement is performed by the cilia.Reproduction occurs both sexually and asexually.They are living in soils, mosses, fresh water, seas.The representative of the class of ciliates - Paramecium.
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