Answer:
Precipitation, water availability, sunlight, and temperature are all abiotic factors. Deserts are characterized by their lack of rainfall. Although we usually think of deserts as being hot, some deserts can be cold too. Biotic factors are all the living things in an ecosystem. So organisms such as cacti and the kangaroo rat.
Answer:
I hope u meant apes from primates....but u look at the different splits dents and homes in the skulls to determine if they have a common ancestor. u can also compare skull size and density. hope this helps ♥
B - FRONTS occur when two AIR MASSES meet!