Answer:
2 layers are in the plasma membrane
Answer:
El magnetismo es el conjunto de fenómenos físicos mediados por campos magnéticos. Estos materiales son ferromagnéticos e interactúan fuertemente con los campos magnéticos externos a la vez que generan un campo magnético propio. Esto permite la tan conocida repulsión y atracción entre los polos de los imanes.
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Answer: Catalase is a common enzyme, found in nearly all living organisms. It catalyses hydrogen peroxide into water and oxygen and protects organisms from free radicals It also has industrial uses to prevent certain contaminants in food and as a disinfectant for contact lenses and a cleansing agent in some other products.
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Answer and Explanation:
All the components a prokaryotic cell can have are:
- Plasma membrane
- Cell wall
- Capsule
- Cytoplasm
- Nucleoid (where DNA is, it is not an actual nucleus)
- Plasmid
- Ribosomes (for protein synthesis)
- Pillus or Pili
-Flagellum or flagella
-Fimbria or fimbriae
A typical prokaryotic cell have plasma membrane, cytoplasm, nucleoid (genetic material) and ribosomes. Some prokaryotic cells have also cell wall, capsule, plasmids, pili, fimbriae and flagella and these components can be used for the cell to survive to unfavourable conditions.
Cell wall mantains the shape of the cell, prevents dehydratation and gives extra protection. Capsule is useful for the cell to attach surfaces. Plasmid is a circular molecule of DNA which is able to replicate independently of the chromosome (in nucleoid) and it can be transfered through a pillus to another prokaryotic cell. Plasmid can contain a gene that confers bacteria an antibiotic resistance, so if the cell posses the plasmid, it is resistent to the antibiotic. Flagellum is used for locomotion (to move on in a medium) and fimbriae are used to attach to surfaces.
Answer: When a blood vessel contracts for a short period of time.This constriction can contract small vessels completely and avoid the flow of blood through them.
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