Answer: Option A.
Explanation: The correct answer to the question is option A, because not all proteins are made up of some combination of 20 essential amino acids.
It is caused by changes in the suns position in the solar system
The flow of chemical elements and compounds between living organisms and the physical <span>environment.</span>
Answer:
The correct answer would be hybridization.
Hybridization refers to the process by which organisms of different breed, species, or varieties are selectively interbred in order to produce offspring with desired characters.
Similarly, Maltese dogs were selectively bred in order to attain characters like the small size, less shedding of hairs et cetera.