Why breeding sows and boars should be come from good mothers ​

Many kangaroo rats live in the sonoran desert of the southwestern united states. they have a variety of adaptations for living in the desert. under which circumstance would the kangaroo rats of the sonoran desert be most likely to develop new adaptations by natural selection?

Which of the following is a macronutrient? carbohydrates lipids amino acids all of the above

Across of blue x blue (both heterozygous) would result in