Explanation:
the onset of the menstrual flow
Night vision because the creature will be able to hunt food in the night, having enhanced eye sight. To continue, light colored fur would make the creature stand out taking away cover and the other answers have no benefit to the scavenger.
The parent must copy its own DNA and provide a copy to its offspring.
or Reproductive.
Coronary vessels supply blood to heart muscles ..blockage in them will cause hypoxia in heart muscles which leads to heart attack
