Jezelyn needs to create a project that shows geographic isolation in action and decides to make a video which of the following w

Respuesta:

El orden correcto es:

1. Gran cantidad de glucosa en la sangre, enviando señales hacia el páncreas.  
2. Síntesis de hormonas por células beta.
3. Unión de hormonas con receptores en el hígado.
4. Ingesta de moléculas de glucosa de la sangre por transportadores específicos.
5. Liberación de hormonas desde los receptores

Explicación:

• El páncreas produce dos hormonas clave para la regulación de los niveles de glucosa en la sangre.
• Las dos hormonas, glucagón e insulina, aumentan y disminuyen el azúcar en la sangre respectivamente.
• La insulina reduce la glucosa en sangre al estimular las células del cuerpo para que aumenten la ingesta de glucosa.
• El cerebro detecta la alta/baja glucosa en sangre y, a continuación, envía señales al páncreas para iniciar la síntesis de insulina o glucagón por las células beta.
• Estas hormonas se unen a receptores en las células del cuerpo; en las células hepáticas, en el caso de la insulina.
• Los receptores inician la señalización celular que facilita la entrada o salida de glucosa dentro o fuera de las células del cuerpo.

Answer:

Convergent plate movements can lead to the formation of mountains and volcanoes, while divergent movements can result in ridges and rift valleys.

Explanation:

The Earth's crust consists of multiple rigid tectonic plates that glide over the mantle. These plates vary in shape and size, and they are continuously interacting with each other. Consequently, the movement of each plate influences the others. The presence of significant geological formations like faults, earthquakes, mountains, volcanoes, ocean basins, and the distribution of continents on the Earth's surface stems from the interactions of these tectonic plates that either converge or diverge.

Convergent plate movements: When two oceanic plates converge, one sinks beneath the other creating a deep depression known as an ocean trench. The subducted plate melts into the mantle, causing molten rock to ascend and form a series of volcanic islands behind the trench. When two continental plates converge, they compress and fold, resulting in extensive mountain ranges, like the Himalayas, formed by the collision of the Indian-Australian and Eurasian plates. In scenarios involving the convergence of continental and oceanic plates, the denser oceanic plate goes below the continental plate, resulting in the formation of a volcanic arc. Examples include the Cascade Mountains in North America and the Andes Mountains in South America.

Divergent plate movements: When oceanic plates diverge, a ridge forms and seafloor spreading (rift valleys) occurs. On the other hand, when two continental plates diverge, they slowly separate, causing one continent to split into smaller landmasses while magma rises into the created rift, eventually leading to the formation of a new sea. The Red Sea, a product of the rifting between the Arabian and African plates, serves as an example. Divergent margins involving continental-oceanic interactions do not occur.

In the case of transform movements, two rock plates slide against each other at their margins, leading to the development of a fault or crack. This sliding motion can generate an earthquake due to the accumulated energy. The San Andreas Fault in California, where the Pacific and North American plates meet, exemplifies a transform plate boundary.

Answer:

1.  Mutation- enhances genetic variation

2. Selection- may raise, lower, or maintain genetic variation

3. Genetic drift- diminishes genetic variation.

4. Gene flow- could either enhance or reduce genetic variation

Explanation:

Different allele frequencies are expected in the two groups.

North American:

72 birds altogether => 144 total alleles

From 72, 55 birds have short plumes, hence 17 are short-plumed.

q^2 = (2*17) / 114 = 0.236

Frequency(short plume allele) = q = 0.486

Frequency(long plume allele) = p = 1 - q = 0.514

Thus, from the North American group:

0.486 * 114 = 55 long plume alleles

0.514 * 114 = 59 short plume alleles

South American:

252 birds totaling => 504 alleles

Out of 252 birds, 75 have long plumage, 177 are short-plumed.

q^2 = (2*177) / 504 = 0.702

Frequency(short plume allele) = q = 0.838

Frequency(long plume allele) = p = 1 - q = 0.162

Thus, from this South American group:

0.162 * 504 = 82 long plume alleles

0.838 * 504 = 422 short plume alleles

For the combined population:

55 + 82 = 137 long plume alleles

59 + 422 = 481 short plume alleles

137 + 481 = 618 total alleles

p = 137/618 = 0.222

q = 481/618 = 0.778

The new population reflects the p and q from this blended result. It consists of 1000 individuals. The share of long plumed birds will be the sum of homozygous long plumed and heterozygous long plumed, calculated as: p^2 + 2pq, which you multiply by the population count of 1000 for the outcome.

population size * (p^2 + 2pq) = 1000 * (0.222^2 + 2*0.222*0.778) = 395 birds (final result)