Answer:
C 
Explanation:
It is known as lactation. The suckling action of an infant produces prolactin, which leads to milk production; more suckling leads to more prolactin, which in turn leads to more lactation. This is a positive feedback system as the product (milk) produces more suckling and more hormone. When the child is no longer breast feeding, the prolactin drops off and milk production goes down.
 
        
             
        
        
        
<span>Most of the energy from photosynthesis flows out as heat is the statement not correct.</span>
        
                    
             
        
        
        
Answer: Replication
Explanation: When the cell is preparing to divide it will <u>replicate</u> its DNA so that both of the daughter cells will have a complete set of the DNA. It's like a book of instructions and the cell has to perfectly replicate it so that when it splits into two both of the new cells will have a perfectly made copy of it! Hope this helps :)
 
        
             
        
        
        
Answer:
Invertebrates are the organisms in which backbone or vertebral column is absent. 
The three macroinvertebrate categories are annelids, mollusks and arthropods. 
Annelids are the organisms having segmented body. They are found in moist places. Examples are leeches and earth worms. 
Mollusks are the organisms which are enclosed in a calcium carbonate shell. Examples are snails and slugs. 
arthropods are the invertebrates which have segmented body and jointed appendages. Examples are insects and crustaceans etc.