The answer is 2. For instance Sweat glands are exocrine glands.
Double jointed means flexible in unusual places like fingers, toes, legs, etc.
Answer:
It's visual
Explanation:
That's the short answer it's because it visual. A pedigree has squares, circles, half colored squares and half colored circles and lines drawn to show the offspring or marriage. To me, it's like looking at a family tree except it's genetics! That's one way on how it simplifies the analysis of inheritance. Just a note to remind you about pedigrees. Squares are males and circles are female. If the box or circle is half colored with black, they are a carrier for a genetic disease (it depends on what their family has had like diabetes or sickle cell disease).
Its a powerful research tool that helps scientists understand how highly migratory animals interact with their environment. I seen this in my dictionary of science, NOT GUARENTEED its the answer tho, good luck and hope this helps.