Answer:
the Y chromosome is smaller than the X chromosome.
Explanation:
The male has an X and Y sex chromosome which is an exception to the general rule that homologous chromosomes are identical as the Y chromosome is smaller thus enabling it to swim faster than the X chromosome. The Y chromosome also has a longer lifespan compared to the X chromosome. The male genotypes is XY. Males are heterogametic as they produce two types of gametes, one carrying the X and the other carrying a Y chromosome.
Answer:
A. Layer A is the troposphere and Layer B is thermosphere
Explanation:
The troposphere is the lowest layer of the atmosphere. THis is where all life life resides and where weather occurs as well. It contains the air we breathe. As we go higher in the troposphere, the temperature goes down.
The thermosphere is part of our atmosphere but it is very high up and considered to be part of outerspace as well. It is heated up by the UV rays and X-rays that it absorbs.
