Explanation:
<h3>EVOLUTION CONNECTION Genes important in the embryonic. development of animals, such as homeobox-containing genes, have been relatively well conserved during evolution; that is, ... other genes.</h3>
 
        
             
        
        
        
In many cases, the activity of an enzyme is regulated by Negative feedback where the end product acts as a non competitive inhibitor.
In feedback inhibition the end product of a metabolic pathway acts on the key enzyme regulating entry to that pathway, keeping more of the end product from being produced. The feedback inhibition acts at the first committed step of the pathway, meaning the first step that's effectively irreversible. The pathway steps regulated by feedback inhibition are often catalyzed by allosteric enzymes. 
        
             
        
        
        
In a peptide bond formation between two amino acids, a water molecule (A) is liberated. This reaction is called condensation. The water molecule is formed by a single hydroxide ion being removed from one amino acid, and a single hydrogen ion from the second amino acid, which combine to form a water molecule.
        
             
        
        
        
Answer:
D. 12cm
Explanation:
there are 8 A1, C1 and so on alleles there, this will be 8 cm and there are about 8 a2 and so on alleles,  this will be 4cm.
8 + 4 = 12cm
 
        
             
        
        
        
The correct answer is "neurons".
Neurons are nerve cells which connect to each other using synapses and form neural networks. They exhibit high levels of specialization and are the primary components of the central nervous system. 
Myofibrils are contractile fibers which form the striated muscle cells. Sarcomeres are the structural unit of the myofibrils.