Where are the answers?? Lol
Its simple.. cereal, salad,soup... the teacher wants you to have three common mixtures because the teacher wants to see if you know what things are mixtures in your life. Why i choose CSS/ Cereal,salad,soup because You can drain the milk or take out the cereal.. from cereal, and with a salad you can take out one of the things Ex. Carrot, tomato, chicken, cheese (very hard but you can do it) e.t.c. and soup because you can take out the veggies or meat or noodles.
They have the same climate and similar dominant communities
Sexual reproduction offers genetic variation, as the offspring are a combination of 2 sets of genes opposed to one. This ultimately leads to evolution and the adaption to changing environments :)