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Cells are mainly composed of nucleus and cytoplasm, and have a cell membrane on their surface. Higher plants have a cell wall outside the cell membrane, plastids in the cytoplasm, chloroplasts and vacuoles in the body, and mitochondria. Animal cells do not have a cell wall, and centrosomes are often present in the cytoplasm, while higher plant cells do not.
Generally speaking, most microorganisms such as bacteria and protozoa are composed of a single cell, that is, single-celled organisms, while higher plants and higher animals are multicellular organisms. Cells can be divided into two categories: prokaryotic cells and eukaryotic cells, but some people have proposed that they should be divided into three categories, that is, the ancient karyotic cells that originally belonged to prokaryotic cells should be separated as a parallel category. The discipline that studies cells is called cell biology.
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What kind of cells are paraspheroid cells made of? (Shed acres).
a.Interlobular artery smooth muscle cells.
b.Enterpular microhubaric arterial endothelial cells.
c.Inferior arteriolar smooth muscle cells.
d.Out-of-spherical arteriolar endothelial cells.
e.Smooth muscle cells of the bulb micropants and cavity arteries.
Correct Answer: Inferior arteriolar smooth muscle cells.
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Basic explanation.
1.The tiny ones are usually seen by a microscope and are separated from the outside world by a semipermeable membrane2Now it can be compared to the basic building blocks of things.
Explain in detail. Biological terms. The basic units that make up an organism. The body is so small that it can only be seen under a microscope.
The shapes are varied. It is mainly composed of the nucleus and cytoplasm, and has a thin film on the surface. The structure of animal and plant cells is about the same.
Plant cells have a cell wall outside the plasma membrane, and plastisomes are often present in the cell wall, centrosomes are often found in animal cytoplasms, but not in higher plant cells. Cells have functions such as locomotion, nutrition, and reproduction.
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1.Eukaryotic cells: outer cell membrane, middle cytoplasm, inner nucleus.
There are various organelles within the cytoplasm: mitochondria, Golgi apparatus, ribosomes, endoplasmic reticulum, centrosomes (higher animals), chloroplasts (green plants), etc.
Inside the nucleus: nucleolus, nuclear pores, etc.
2.Prokaryotic cells: cell membrane, cytoplasm, nucleoid.
There are only ribosomes inside the cell.
Prokaryotic bacteria and plants also have cell walls outside their membranes.
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Cell membrane, cytoplasm, organelles. Plant cells have a cell wall outside the cell membrane.
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The cells are made up of eastern cherry blossoms and small crocodiles.
Grip the racket alive (in the non-hitting state, the racket cannot be held to death, and the racket handle should be able to rotate flexibly for different hitting actions; In the batting state, the fingers tighten the racket, especially the index finger and thumb, to ensure that the hitting action is crisp and the line is clear). >>>More
There is a special accurate detection equipment for detecting oxygen and carbon dioxide in the cell culture process, refer to ** - Shanghai Yongzhou Experimental Equipment****.
"Structure determines function" is one of the basic principles of biology, if a cell has a certain structure, it should have the corresponding physiological function of that structure. >>>More
Table tennis playing style and skills.
Structurally more or less the same.
Animal cells do not have a cell wall, whereas plant cells do. Plant cells are also unique to chloroplasts and centrosomes. >>>More