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irga5000 [103]
2 years ago
12

Como se forma un tumor?

Biology
2 answers:
elena-s [515]2 years ago
4 0

Question:  

how does a tumor form?

Answer:

En general, los tumores ocurren cuando las células se dividen y se multiplican excesivamente en el cuerpo. Normalmente, el cuerpo controla la división y el crecimiento de las células.

English:  

In general, tumors occur when cells divide and multiply excessively in the body. Normally, the body controls the division and growth of cells.

Anuta_ua [19.1K]2 years ago
3 0

Answer:

Se desarrolla cuando las células del cuerpo se dividen y crecen a un ritmo excesivo. Normalmente, el cuerpo puede equilibrar el crecimiento y la división celular. Cuando las células viejas o dañadas mueren, se reemplazan automáticamente con células nuevas y sanas. En el caso de los tumores, las células muertas permanecen y forman un crecimiento conocido como tumor.

Explanation:

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Hubble's law states that galaxies are receding from us at a speed that is proportional to their ________. distance orientation v
alukav5142 [94]
The distant galaxies we have seen are moving away from earth by the red shift the law that describes its expansion is Hubble's law. It is regarded as the main observational basis on enlargement of the world. and imitation to acquire the supportive evidence over big bang model. It states that galaxies are becoming extinct at a speed that is proportional to their distance. 
3 0
3 years ago
3. The plantlets have a different genetic code from the parent plant.
wolverine [178]

Answer:

The plantlets have a different genetic code from the parent plant. This represents asexual reproduction. The plantlets are the same size as the parent plant.

Explanation:

4 0
3 years ago
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Suppose the femur bone of an animal has 1,000 atoms of carbon-14 when the animal dies. How many atoms of carbon 14 will be prese
shtirl [24]

Answer:

After 6000 years, approximately 500 atoms of carbon-14 will be left in the femur bone of an animal which had 1000 atoms of carbon-14 when the animal died.

Explanation:

The half-life of a radioactive isotope of an element is the time taken for half the atoms present in a given amount of the element to undergo decay or disintegration. For example, the half-life of carbon-14 isotope is 5730 years. This means that, if there are 100 atoms of carbon-14 present in a given sample of a material, in the next 5730 years, approximately, 50 atoms of carbon-14 will be left in the material.

Since the half-life of radioactive isotopes are constant, these radioactive isotopes are used in the determining the ages of ancient life-forms as well as rocks.

In the given example, after 6000 years, approximately 500 atoms of carbon-14 will be left in the femur bone of an animal which had 1000 atoms of carbon-14 when the animal died.

8 0
3 years ago
What type of blood vessel returns blood to the heart?
jasenka [17]
The answer is (b. Vein
6 0
3 years ago
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Endosymbiotic theory is supported by similarities between chloroplasts and * Cyanobacteria Viruses Yeasts None of the above
stiv31 [10]

Answer:

Endosymbiotic theory is supported by similarities between chloroplasts and * Cyanobacteria.

Explanation:

The endosymbiotic theory proposes that mitochondria and chloroplasts were once free-living bacteria that were phagocytized by another cell but not digested. These bacteria got to adapt to their host, and both cells became interdependent.  

Both organelles have many similarities with other free-living bacteria. Chloroplasts probably derivate from cyanobacteria because both cells absorb sunlight, produce ATP, and organic molecules. And mitochondria derivate from rickettsias because they produce ATP in the same way by using the Krebs Cycle and Oxidative Phosphorylation.

From the phagocytosis moment, these two cells became so dependant on each other, they could not survive without the other one.  

Chloroplasts and mitochondria share some traits with free-living bacteria, that support the theory.  

• Both organelles present their genetic material. This DNI is independent of the cells´ DNA, is bi-catenary and circular, identical to the bacterial DNA, and very different from the one of the eukaryotic cells.

• Both organelles divide by binary fission, not by mitosis, and can synthesize their ribosomes and organelles.    

• Both organelles present a double membrane, a characteristic that reinforces the idea of being phagocyted. The internal membrane looks identical to the bacterial membrane, while the external membrane looks like the eukaryotic one.  

In fact, in this internal membrane are placed the energy centers, just as it occurs in bacterias membrane.  

• Finally, the sizes of the organelles are similar to the size of some procaryotes

6 0
2 years ago
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