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1 year ago

At some point in their life cycle, all cells have a _, whereas not all cells have a(n) _.

1 answer:

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The cell membrane is present during the whole cycle. The nuclear cell breaks and then is regenerated. At some point in their life cycle, all cells have a _cell membrane_, whereas not all cells have a(n) _nuclear cell_.

<h3>What happens to the membrane during cell cycle?</h3>

The cell cycle involves two stages. First occurs the interphase, and after that cell division. During the interphase, the cell prepares for division, duplicating its size, its content, and genetic material.

During the prophase, the nuclear membrane breaks. Cell division occurs (either mitosis or meiosis), and at the end of the cycle, the nuclear membrane regenerates again (during the telophase).

Finally, cytokinesis occurs in which through invagination of the cell membrane, the cell divides into new cells.

The cell membrane is present during the whole cycle, protecting the cell content. The nuclear cell breaks and then is regenerated.

At some point in their life cycle, all cells have a _cell membrane_, whereas not all cells have a(n) _nuclear cell_.

You can learn more about the cell cycle at

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2 years ago

Which cell type divides fastest? (in order)

BlackZzzverrR [31]

Answer:

A. Skin cells

Explanation:

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2 years ago

If you needed copper, which mineral would you prefer to mine: chalcopyrite or bornite?

nekit [7.7K]

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Bornite

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3 years ago

Explain why a hydrogen atom can become either an ion or a part of molecule?

NikAS [45]

If it loses that 1 electron (0 electrons, 1 proton, 1 neutron) it become an ion that is positively charge because it has more protons than electrons. [Ignore the neutrons] 

If it gains an electron (2 electrons, 1 proton, 1 neutron) it becomes an ion that is negatively charge because it has more electrons than protons 

A molecule - when 2 or more "different" elements combine or when 2 or more of the "same" elements combine 

1 proton 1 electron <----- that is considered to be neutral 

3 protons, 3 electrons <----- neutral 

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3 years ago

What are the smallest blood cells in the frog?

Tamiku [17]

Answer:

Unlike typical mammalian red blood cells, those from amphibians, such as frogs, contain a DNA-bearing nucleus that is visible in the center of the cell. The circulatory system of amphibians is rather unusual, their hearts having three chambers, two atria, and a single ventricle.

NegativePositive

Positive

The design of the amphibian circulatory system is curious because blood accumulates oxygen in the lungs and is then returned to the heart before being pumped into the rest of the circulatory system. Therefore, a mixing between oxygenated and deoxygenated blood occurs as blood returning to the heart from the lungs is mixed with incoming blood from the body. Frogs handle this situation by having a very slow metabolism and by absorbing some oxygen through their skin. In addition, the ventricle does have some directional control over the distribution of the blood.

Negative

The presence of a nucleus in amphibian red blood cells allows researchers easy access to large quantities of amphibian DNA. Frog blood has both a solid and a liquid portion. The liquid plasma carries solid elements such as red and white blood cells. Blood can be collected from frogs and the red blood cells isolated by centrifugation. After removal of the residual plasma, purified cells can be treated with specific enzymes and detergents to digest the cellular envelope and release DNA from its protein complex. The DNA is then useful for scientific studies and experiments.

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Explanation:

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3 years ago

At some point in their life cycle, all cells have a _____, whereas not all cells have a(n) _____.

At some point in their life cycle, all cells have a _, whereas not all cells have a(n) _.