An aquifer is an underground layer of water-bearing permeable rock, rock fractures or unconsolidated materials (gravel, sand, or silt). Groundwater can be extracted using a water well.
Some ways to reduce stress is Walking your dog it’s great to reduce pressure and stress,Another way is Going for a bike ride and getting fresh air, watching a movie or a tv show is great to get your mind of everything that is making you stressed. meditation include better focus and concentration, improved self-awareness and self-esteem, lower levels of stress and anxiety, and fostering kindness. Meditation also has benefits for your physical health, as it can improve your tolerance for pain and help fight substance addiction
Answer:
a. population
Explanation:
Gene flow cannot occur in hybrids because 99.9% of the time hybrids offspring are not fertile.
At genus level is not possible either because a hybrid is a cross breed at the genus level (horse-donkey).
A population is a group of species of 1 kind. A population of donkeys.