If a haploid call has 50 chromosomes, the sex cell created from that would take half of them, which is 25. This would apply to any number of chromosomes a haploid cell has.
The brain primarily interpret the strength of a stimulus in the nervous system based on the frequency of the action potential. This answer has been confirmed as correct and helpful.
Important factor defining the desert biomes is its tendency to lose water by evaporation, and this potential for water loss exceeds the annual rainfall and defines what organism can live in there.