Answer:
The correct answer will be option-B
Explanation:
A species is a group of similar organisms which interbreed with the individual of the same group of closely related individuals.
Species are reproductively isolated by various mechanisms, one of which is due to the behavior.
When the species are not able to reproduce to different species due to the differences in their behaviour in terms of mating rituals which could be due to different mating rituals or a different way of mating like observed in the grasshoppers is known as behavioral reproductive isolating mechanism.
In grasshoppers, the grasshopper's species cannot interbreed due to the differences in the mating songs as a part of the behavior.
Thus, Option-B is the correct answer.
<span>well transportation is onne because there are trains that use magentic levation
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Answer:
The answer is b. Both of them are characterized by selective permeability.
Explanation:
- Option a. states that both, the nuclear and the cell membrane have two layers. This is only true for the nuclear membrane that consists of two lipid bilayers whereas the plasma membrane only contains one layer.
- c. Only the nuclear membrane has nuclear pores that connect the two bilayers. The pores act as protein channels or passages that allow transport of materials. The cell membrane does contain channel proteins or transmembrane proteins but not protein channels.
- d. The nuclear membrane separates nuclear contents from the cytoplasm whereas the cell membrane separates cellular contents from the extracellular environment.
Distillation is a method for separating the components of a mixture based on boiling point differences
