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Irina-Kira [14]
3 years ago
8

Total magnification of a specimen under the scanning objective is:

Biology
1 answer:
umka21 [38]3 years ago
8 0
C is the answer to your problem
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Que tipo de aislamiento reproductivo exhibe la mula?
bulgar [2K]

Answer:

<em>Aislamiento postreproductivo: Esterilidad del híbrido</em>

Explanation:

El concepto biológico de <u>especie</u>, en su definición, destaca que los ejemplares de una especie no pueden entrecruzarse con ejemplares de otra especie distinta, o bien, en caso de hacerlo, no hay éxito reproductivo.

Existen distintos mecanismos de aislamiento reproductivo, que son barreras que inhiben o interrumpen el flujo génico entre especies distintas. 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;
  • Esterilidad del híbrido;
  • Híbrido con viabilidad o fertilidad disminuido;
  • Interacciones citoplasmáticas.

La mula es producto de la cruza entre dos especies distintas: una yegua (<em>Equus ferus caballus</em>) y un burro (<em>Equus africanus asinus</em>). 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 pueden producir gametas funcionales, por lo cual no pueden reproducirse.        

4 0
2 years ago
The fact that fish, penguins, and dolphins all have the same basic shape is BEST explained by which of the following?
NISA [10]

Answer:

I would say it is E.

Explanation:

because fish, penguins, and dolphins are aquatic animals. It can't be A. because if it were vestigial it would be useless. It can't be B even though it does seem like the right answer because the are all aquatic. It can't be C. because it would been that the same species would have the same niche which is not possible. It can't be D. because every organism is evolved from a common ancestor.

6 0
3 years ago
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An ecosystem has experienced a flood
sergejj [24]
Well trees and live animals well be affected 

6 0
3 years ago
A farmer uses genetic engineering to inject dairy cows with a genetically altered hormone (GAH) to result in the production of m
a_sh-v [17]

Answer:.Use of the GAH may increase the amount of hormones in the milk.

Explanation:The increased amount of hormones could cause unintended transmission of the genetically altered hormone or related hormones to be present in the milk.

6 0
3 years ago
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A plant survives in a tropical rain forest. When placed in a temperate forest, it
svet-max [94.6K]

Answer:

A. The plant needs very stable weather.

Explanation:

A plant survives in a tropical rain forest. When placed in a temperate forest, it  dies within a year. The most likely characteristic of this plant is it needs very stable weather.

7 0
3 years ago
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