Arrange the following structures from largest to smallest A chromosome
A nucleus
A gene

Largest to smallest: Nucleus, Chromosome, Gene

Explanation:

Nucleus is the big shell that holds all the chromosomes

Chromosome is in the nucleus

A gene is part of the chromosome

correct answer is option a.

tropopause, stratopause and mesopause have all in common aspect that is point of maximum temperature in its layer of the atmosphere. all layers of atmosphere observe abrupt change in temperature. tropopause is the boundary between troposphere and stratosphere. stratopause is the boundary between stratosphere and mesosphere. mesopause is the boundary between mesosphere and thermosphere. these all boundaries are ranges between altitude of 0 to 80 km.

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