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makvit [3.9K]
3 years ago
8

Which of the following statements is correct?

Biology
2 answers:
murzikaleks [220]3 years ago
6 0

Source 2

Using any type of energy source can negatively impact the environment. Fossil fuels have the greatest and most damaging impact on the environment, but renewable energy sources can still cause a significant amount of damage—as well as cause unintended future consequences. For example, habitat loss, carbon dioxide emissions, and land destruction are just a few of the negative impacts that arise from using renewable energy sources.

   

Source 3

Renewable energies such as wind, solar, and geothermal carry the potential for environmental damage. Wind energy is a relatively clean method for producing electricity because it does not produce harmful emissions. However, this energy source requires a large amount of land. Wind turbines have been known to harm birds and bats. Solar energy also contributes to habitat loss, and making solar panels produces harmful chemicals. Geothermal energy can harm water quality. It can even cause the surface of the land to sink.

telo118 [61]3 years ago
4 0

The anwser should be B. Nonrenewable resources generally have a higher impact on the environmental than renewable resources.

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La reproducción sexual consisten en la unión de dos gametos uno femenino y otro masculino, para formar un nuevo individuo con características provenientes de ambos progenitores. Los gametos son células especializadas que se forman por un proceso meiótico y tienen en su núcleo la mitad de la información genética de un organismo, por lo que reciben el nombre de células haploides de manera que cuando se une sus cromosomas se forman células diploides característico de la especie. La característica más importante de este tipo de reproducción es la variación genética que implica que los descendientes tengan características de sus dos progenitores, por lo que son diferentes a ellos. El proceso en el que se une las células sexuales se le conoce como fecundación. En los animales esta pude ser interna o externa.

Explanation:

Los gametos (óvulos y espermatozoides) son células germinales especializadas que se desarrollan a partir de un proceso llamado gametogénesis (espermatogénesis en machos y ovogénesis en hembras). El proceso de gametogénesis implica un tipo de división celular llamado 'meiosis' donde la cantidad de cromosomas se reduce a la mitad. En humanos, el número cromosómico diploide (2n) de 46 cromosomas se reduce a un número haploide (n) de 23 cromosomas. La fecundación es el proceso por el cual los gametos se fusionan durante la reproducción sexual para producir un cigoto diploide. En la reproducción sexual, el aumento de la variación genética en la progenie es un resultado de tres procesos diferentes: la unión aleatoria entre gametos durante la fecundación, la distribución independiente de los cromosomas durante la gametogénesis y el entrecruzamiento (recombinación o crossing over) entre cromátidas de cromosomas homólogos durante la meiosis. Finalmente, en animales, la fecundación puede ser interna, la cual se produce mediante la unión de los gametos dentro del cuerpo de la hembra (por ejemplo, gallina, leona, cebra, etc.), o fecundación externa, donde la fusión de gametos se produce en el ambiente externo (por ejemplo en peces, sapos, ranas, etc.).

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3 years ago
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