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Monica [59]
3 years ago
13

-what new inventions made possible for scientists to practice direct observation?

Biology
1 answer:
Cloud [144]3 years ago
8 0
Microscope is one of the invention for scientist to practice direct observation. It allows scientists to observe the world in micro scale.
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The answer is C. Their cells have nuclei.

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State of matter with no define shape or no defined volume?
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Gases have no defined shape or volume.

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Which type of system or instrument would be best at gathering data on wind
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Anemometer

Explanation:

It should be understood that the anemometer is different to wind vane in both structure and function.

This is because, anemometer is an instrument that is used to measure the speed of the wind, while the wind vane is used to measure the direction of the wind.

Therefore, in this case, the anemometer is going to be the instrument to measure the speed of the wind above the ocean waters.

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Need help on checking my answers! The ones circled in yellow are the ones that I believe the answers are. Please and thank you
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This is cyclic change because the population is consistently going up and back down.

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3 years ago
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;
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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
3 years ago
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