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iren [92.7K]
3 years ago
5

I need help quick!

Biology
1 answer:
Oksi-84 [34.3K]3 years ago
7 0
(hope i can get brainliest)
DNA, RNA AND or genetic molocules
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Which sequence of human body structures is ordered from most complex to simplest?
Crazy boy [7]

Answer:

A

Explanation:

Heart cells are complex to find

Heart tissue is somewhat easy to find

Heart circulatory system is easy to find

5 0
3 years ago
Two snails in the same class must also be in the same
Anuta_ua [19.1K]
I think the answer is b as in boy.
8 0
3 years ago
In a healthy person, the feces leaving the body contain very few undigested molecules from food. One major exception is cellulos
Drupady [299]
From this we can conclude that the human digestive system does not produce enzymes that can break down cellulose. The correct option among all the options that are given in the question is the fourth option or the last option. I hope that this is the answer that has come to your desired help.
8 0
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;
  • Esterilidad del híbrido;
  • Híbrido con viabilidad o fertilidad disminuido;
  • Interacciones citoplasmáticas.

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
What does bone consist of?
MrRa [10]

mostly collagen and some calcium phosphate

4 0
3 years ago
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