Answer:
if we`ll not classify living beings then it`ll become difficult to study all of beings one by one. In order to make their study easier biologists have classified all living beings into five major groups.
Explanation:
Acetyl choline.............
The
correct answer is no.
<span>The
development of retinoblastoma occurs as a consequence of mutation of genes RB1
or MYCN. Those mutations occur in the early stages of fetal development and affect
the way in which cells grow and develop within the body. The more common is the
defective RB1 gene that can be inherited from either parent. The expression of
the RB1 allele is autosomal dominant.</span>
The exchange of gases between the lungs and the blood is known as exterior respiration. The correct option among all the options that are given in the question is option "C".
Exterior respiration is
actually the process in which the exchange of gases between the alveoli’s of
the lungs and the blood take place. The blood actually carries oxygen from the
lungs and gives out the carbon dioxide to the lungs. This is a continuous
process and is required for the survival of human beings.