Answer:
The ozone layer is being depleted due to CFC's. CFC's are found in aersoal spray cans and refrigants, when they are released into the atmosphere it causes depletion of the ozone layer. Humans are the one who made the CFC's, causing the ozone layer to deplete, even though they have been banned now, a lot of damage has been done.
Answer from Gauthmath
Answer:
When the salt water is mixed with fresh water,it is called brakish water which have the salinity 0.5 to 35 ppt.
Explanation:
The mixing of fresh and salt water is important for aquatic organisms.
The catadromous fish born in marine habitat but they spend their rest of life in the fresh water where growing and maturation takes place.
Ex- Eel is the common example of catadromous fish.
Like wise,
Anadromous fish born in fresh water and spends their life in the sea and return to fresh water for spawning.
For example Salmon, smelt, shad, are common examples.
Thus mixing of water is important for breeding and growing of these fishes.
More over, the brakish water contain world's most diversified life forms.
Answer:
Mate two dogs that have the desired trait
Explanation:
In order to breed dogs for a particular trait one ought to mate two dogs that have the desired trait. This process is referred to as artificial selection or selective breeding.
Selective breeding refers to a process by which new organisms with desirable characteristics or traits are developed. Breeders select two parents having the desired phenotypic trait to reproduce thus yielding offspring with the desired trait.