The moon has a higher maximum surface temperature compared to Earth (253 degrees of moon to 136 degrees of Earth), but this also depends on night (which is colder) or day (which is hotter).
The moon has such extreme temperatures because it has no atmosphere that can "reflect" some of the heat from the sun, whereas the earth does.
Yes, crossing over does not occur during mitosis. As mitosis is simply the duplication of cells, there is no gene variation that comes from crossing-over.
They will be 100% heterozygous
The major organ that you would find in the lymphatic system would be the spleen.
