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makkiz [27]
3 years ago
10

When the cell concentrates potassium within, against the natural tendency of matter, it is performing:

Biology
1 answer:
pantera1 [17]3 years ago
8 0
The answer is active transport. 
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What damaging byproduct resulted from organisms that began to use photosynthesis? 
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Oxygen.

Oxygen was fatal when organisms started using photosynthesis, this event was known as the Great Oxidation Event.
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What do you think would happen if cells were not able to replicate and divide
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theyed eventually become extinct because they are unable to reproduce

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2 years ago
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Suppose that in unicorns, two autosomal loci interact to determine the type of tail. One locus controls whether a tail is presen
Nina [5.8K]

Explanation:

As you can see in the picture below, this is a dihybrid cross with a twist.

We can accomplish that mutually parentages are heterozygotes for both characters because the genotypes are  

9 unicorns with curly tails (shown in green)

3 with straight tails (shown in red)

3  curly tales trait carriers with no tail (shown in dark blue)

1  straight tail trait carriers with no tail ( shown in light blue)

If this was an ordinary case of the dihybrid cross, we would get a 9:3:3:1 phenotype ratio.

However, since the first trait, the presence of the tail, is affecting the other trait, the trait texture, the ratio is altered.

\frac{1}{4} of the offspring (genotypes tt C_   and tt SS) has no tail, therefore we cannot observe the texture of the tail (some of the tailless individuals have Curly alleles -blue squares marked with green, some of them have Straight alleles -blue square marked with red ).

Therefore, the altered ratio is  \frac{1}{2} curly tails,\frac{1}{4} straight tales, \frac{1}{4} tailless

6 0
3 years ago
En el 1953 el nuevo modelo postulado por Watson y Crick sobre la estructura del ADN explica la misma como forma de doble hélice
finlep [7]

Answer: A Puede ser posible un mecanismo de copia de material genético

Explanation:

El material genético, permite ser replicado, mediante la secuencia de doble cadena con el apareamiento de las bases con ayuda de la enzima telomerasa

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Cervical pregnancies are extremely rare. Women undergoing cervical pregnancies often experience unusual vaginal bleeding. In ext
Alchen [17]

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Ectopic pregnancy can cause the burst of fallopian tube. If previous ectopic pregnancy occured then again onset of this type of pregnancy may lead to life threatening bleeding. Having the abdominal surgery before may also proved as a risk.

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