A. Immune system
It helps our bodies fight everything that comes in our path.
The correct answer would be Polyploide.
Hope that helped!
-astroworld301
Answer:
Dogs were probably domesticated by accident, when wolves began trailing ancient hunter-gatherers to snack on their garbage. Docile wolves may have been slipped extra food scraps, the theory goes, so they survived better, and passed on their genes. Eventually, these friendly wolves evolved into dogs
Explanation:
A gene contains the genetic instructions for making proteins.
