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Annette [7]
3 years ago
7

Which of the following correctly describes the importance of the nitrogen cycle?

Biology
1 answer:
Ivan3 years ago
6 0

to create ammonia by plants to create proteins

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What is the role of skin grafts in healing burned skin? protecting the burned skin so healing can occur creating new skin to hea
qaws [65]

protecting the burned skin so healing can occur is the answer .

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3 years ago
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Si se aparean especies diferentes como por ejemplo el cruce entre caballos y burros; podemos afirmar que si llegan a tener desce
White raven [17]

Answer:

El híbrido va a ser esteril.

Explanation:

En la cruza entre dos especies distintas, cuando ocurre, existen distintos mecanismos de aislamiento reproductivo, que son barreras que inhiben o interrumpen el flujo génico entre especies distintas. Es decir que no habrá exito reproductivo de estas cruzas. Se trata de caracteres biológicos propios de cada especie que previenen la reproducción con otras especies.

Estos mecanismos de aislamiento reproductivo pueden ser precigóticos o postcigóticos.  

  1.Pre-copulatorios o pre-cigóticos:

  • Ecológico o por aislamiento de hábitat;
  • Estacional o temporal;
  • Sexual o etológico;
  • Mecánico;
  • Por incompatibilidad de gametas.  

  2. Post-copulatorios o cigóticos:

  • Inviabilidad del híbrido;
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La mula es producto de la cruza entre dos especies distintas: una yegua (Equus ferus caballus) y un burro (Equus africanus asinus). Es un ejemplo de la accion de mecanismo poscigótico, en el cual se forma un híbrido viable esteril. Este ejemplar puede nacer, crecer y sobrevivir, pero que no puede producir gametas funcionales, por lo cual no puede reproducirse.  

7 0
3 years ago
Brian often interrupts his teacher while she is speaking and frequently forgets to complete his homework assignments. He also ha
Anton [14]

Answer:

Brian most clearly exhibits symptoms of ADHD

Explanation:

ADHD stands for Attention Deficit Hyperactivity Disorder is a medical condition where the affected person develops different brain developmental process that leads to poor attention,restlessness,impatient or impulsive etc.

This type of symptoms are mainly found in children and it may lasts upto adulthood.

This type of behviour affect the child in school and at home.

To cure this disease,the affected person should consult the doctor,apply different therapy,medicines are also used to cure this disease.

3 0
3 years ago
14. The average brain weighs about
andrew11 [14]

Answer:

A. three pounds

Explanation:

it definitely doesn't weigh ounces :)

8 0
3 years ago
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An animal that hides under a rock to avoid predators is responding to a(n) _____ stimulus.
ValentinkaMS [17]

The given blank can be filled with External.

The stimulus is a physical entity, which can provoke the response in the body of an organism. The hiding of the organism under the rock in response to the predator is and a type of external stimuli, as in this case, the organisms hide themselves inside the rock in response to the predator, which is present outside the body of the organism.

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