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In prophase 1:
Chromosomes become visible, crossing-over occurs, the nucleolus disappears, the meiotic spindle forms, and the nuclear envelope disappears.
In metaphase 1:
The pairs of chromosomes (bivalents) become arranged on the metaphase plate and are attached to the now fully formed meiotic spindle. The centrioles are at opposite poles of the cell.
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The answer is behavioral isolation.
Reproductional isolation is a way to prevent closely related species to mate each other. This is due to reproductive barriers which can be either prezygotic (before fertilization) and postzygotic (after fertilization) barrier. Behavioral isolation is an example of postzygotic barrier. It is based on behavior, including mating sounds and rituals. Thanks to behavior isolation, the different species (in this example gentoo penguins and emperor penguins) will have different mating rituals so they could attract only individuals of their own species, respectively.
Answer:
<em>Applications of dipole moment:
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<em>(i) Ionic character can be calculated using the value of dipole moment.
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<em>% of ionic character =
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<em>=100* (Experimental value of dipole moment/Theoretical value of 100% ionized molecule)
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<em>(ii) Geometry of the molecule can be predicted using the dipole moment.
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<em>(iii) Dipole moment is helpful in predicting nature of the molecule. Weather it is polar or non-polar in nature.
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