Klinfelters syndrome is when there is an extra X chromosome in males.
So instead of the normal sex chromosomes for males (XY), a male with klinefelters syndrome will have XXY.
I have included a pic of the karyotype to give you a better idea of what I'm talking about.
Hope this helps! I'm happy to help with any other questions you might have :)
The tilt of the Earth is what causes the seasons...In the summer, the northern pole is pointed closer to the Sun giving the northern hemisphere more daylight hours. The opposite is true during the winter.
Answer:
B an animal that can live in fresh water