What does selectively permeable membrane mean


Answer 1


The answer is: It means it is a membrane that will allow certain molecules or ions to pass through it by means of active or passive transport.


All cells are enclosed with a cell membrane. The term, selectively permeable, refers to :

the membrane allows some substances or molecules to enter the cells, and others to be prevented from entering. It also allows substances to leave the cell.

This process can be done by :

Active transport -requires the cell to expend energy to move the materials.

Passive transport- it can be done without using cellular energy.

Answer 2
Selective permeability membrane is the membrane that allows certain organisms to come in and out of the cell.

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Elements used to make for computers include germanium and :
a. oxygen or b. silicon


Explanation: It would be considerably difficult to build computers with a gas. 



These are the organic molecules:

  • Organic molecules can be found in living organisms
  • Carbohydrates, lipids, proteins, and nucleic acids.
  • Molecules that contain carbon, hydrogen, and oxygen
  • Lipids are a more complicated
  • Carbon, hydrogen, oxygen, and nitrogen
  • Proteins are composed of amino acids
  • They form polypeptides
  • Deoxyribonucleic acid (DNA) and ribonucleic acid (RNA)
  • Nucleic acids are composed of nucleotides
  • Phosphodiester bonds
  • DNA is double-stranded molecule and RNA is single-stranded.

What are these molecules about?

1) Organic molecules can be found in living organisms, but they can also be found in non-living things, such as petroleum and coal.

2) The four major groups of biomolecules are carbohydrates, lipids, proteins, and nucleic acids.

3) Carbohydrates are molecules that contain carbon, hydrogen, and oxygen. They are the most abundant biomolecules in living organisms. Carbohydrates can be simple sugars, such as glucose, or complex carbohydrates, such as starch and cellulose.

4) Lipids are a diverse group of molecules that are also made of carbon, hydrogen, and oxygen. Lipids are not soluble in water, but they are soluble in organic solvents, such as alcohol and ether. Lipids can be used for energy storage, insulation, and protection.

5) Proteins are molecules that contain carbon, hydrogen, oxygen, and nitrogen. They are essential for life and are involved in a wide variety of functions, such as structure, metabolism, and cell signaling.

6) Proteins are composed of amino acids. Amino acids are molecules that contain an amino group (-NH2), a carboxyl group (-COOH), and a side chain (R). The side chain varies from amino acid to amino acid and gives each amino acid its unique properties.

7) Linked amino acids form polypeptides. Polypeptides are chains of amino acids that are linked together by peptide bonds.

8) The two forms of nucleic acids are deoxyribonucleic acid (DNA) and ribonucleic acid (RNA).

9) Nucleic acids are composed of nucleotides. Nucleotides are molecules that contain a sugar, a phosphate group, and a nitrogenous base. The sugar in DNA is deoxyribose, while the sugar in RNA is ribose. The nitrogenous bases in DNA are adenine (A), guanine (G), cytosine (C), and thymine (T). The nitrogenous bases in RNA are adenine (A), guanine (G), cytosine (C), and uracil (U).

10) Nucleotides link together to make a nucleic acid through phosphodiester bonds. Phosphodiester bonds are formed between the phosphate group of one nucleotide and the sugar of the next nucleotide.

11) DNA and RNA are structurally different in several ways. DNA is a double-stranded molecule, while RNA is a single-stranded molecule. DNA contains the sugar deoxyribose, while RNA contains the sugar ribose. DNA contains the nitrogenous bases adenine (A), guanine (G), cytosine (C), and thymine (T), while RNA contains the nitrogenous bases adenine (A), guanine (G), cytosine (C), and uracil (U).

Find out more on organic molecules here: brainly.com/question/26556885



how do i actually answer you bro? there are so many questions

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if u are taking about a movie producer and they are people who turn acts into films

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Paleontologists, by examining fossils, dicover traces of life from the geological past. This way we can find out how our world used to look like and what organisms use to live on Earth.



Paleontologists use fossil remains to understand different aspects of extinct and living organisms. Individual fossils may contain information about an organism's life and environment. ... Studying oyster fossils can help paleontologists discover how long the oyster lived, and in what conditions.

What is another name for mosquitoes?


Aedes, Anopheles ,and Culex
Nasty, horrible bugs.
Or you could just say Culicidae (:

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