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STatiana [176]
3 years ago
8

Unlike the cell membrane, the cell wall is

Biology
2 answers:
DaniilM [7]3 years ago
4 0
Only present in plant cells and not animal cells ^^; i guess
sattari [20]3 years ago
3 0
Unlike the cell membrane, the cell wall is a thick and rigid structure. 
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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
3 years ago
Density is mass per unit of volume. Which pair of lab instruments would a student use to measure the density of seawater?
algol [13]

Answer:

A scale and a tape measure.

Explanation:

Use the tape measure to get the volume and the scale to get the mass.

8 0
3 years ago
What are the two major functions of the cell membrane?
alisha [4.7K]
Selectivity permeable membrane and a scaffold for biochemical activity 
5 0
3 years ago
Functionalists would view gender roles in which of the following ways?Gender roles assist in keeping women oppressed within the
Liono4ka [1.6K]

Answer:

Gender roles are necessary to keep the family in balance.

Explanation:

Functionalists perspective of gender roles view conventional gender roles as necessary to commit to family functioning as it tends towards keeping the family balance: Women take on the “expressive” character of putting up with household chores and giving emotional care, grooming and nurturing of family members, while men take on the “instrumental” character of acquiring income and undertaking important family decisions.

6 0
4 years ago
A push or pull is called a force. Unbalanced forces can cause objects to move in many ways but not to
lord [1]
Not to love as easily as other objects for example you need it to be balanced to have it move
4 0
3 years ago
Read 2 more answers
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