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lidiya [134]
3 years ago
10

Science! Simple. 8th grade.

Biology
1 answer:
vovikov84 [41]3 years ago
8 0

Answer:

Atomic theory is the scientific theory that matter is composed of particles called atoms.

Solids: their molecules are close to each other.They can't change their shape nor they can does it expand to fill the entire available volume like gas.

Liquid: A liquid is an incompressible fluid that conforms to the shape of the container in which it is stored. It's molecules are not too close to each other.

Gas: Most gases cannot be seen but are present in the atmosphere.Their particles are far from each other.Gas is described by pressure, volume, temperature and number of particles

Explanation:

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If yes then do mark my answer as brainliest

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What is occurring during the s phase of the cell cycle?
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The S phase of a cell cycle occurs during interphase, before mitosis or meiosis, and is responsible for the synthesis or replication of DNA. In this way, the genetic material of a cell is doubled before it enters mitosis or meiosis, allowing there to be enough DNA to be split into daughter cells.

Pls give brainliest ❤️
5 0
2 years ago
Discuss why prokaryotic cells probably appeared before eukaryotic cells​
dsp73

Answer:

Prokaryotes are smaller and less developed compared to eukaryotes. Some of them inhabit very primitive environments that resemble earth’s early stages. Endosymbiotic theory states that eukaryotes arose by the endosymbiosis of prokaryotes.

Explanation

By endosymbiont theory, eukaryotic cells arise from prokaryotic cells. Here, the theory shows that eukaryotic ancestors lived in close association with prokaryotes, wherein in some cases, prokaryotes have been engulfed and might have lived inside eukaryotes.

Upon being engulfed by a host cell as undigested prey, these prokaryotes could have been internal parasites of the eukaryotes. But, later on, their relationship becomes mutualistic and these prokaryotes become incorporated as organelles, such as in the case of chloroplasts and mitochondria, which were previously separate prokaryotes

______________________________________

6 0
2 years ago
Which one of the following statements is true of enzyme catalysts? A) Their catalytic activity is independent of pH. B) They are
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Answer:

D) They can increase the reaction rate for a given reaction by a thousand-fold or more.

Explanation:

Enzymes are like catalysts with the only difference that they are bio-molecules. Biochemical/chemical reactions are slow because of 'transition state barriers' which require a lot of energy to overcome so enzymes rather than overcoming transition state barrier provide an alternate pathway for biochemical reactions which require comparatively less energy. Thus presence of an enzyme leads to an increase in reaction rate because alternate pathway which requires less energy makes the rate of chemical reaction rapid by a thousand-fold or more.

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Compare and contrast the structures of DNA and RNA
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All the following are ways by which animals help to sustain the carbon cycle except
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Answer:

Option(C): drinking water from streams and ponds

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