Answer:
Option A. can reproduce by budding. 
Explanation: 
Sponges is a multicellular organism which consists of pores that allows water to move through the body. Sponges belongs to kingdom animalia and phylum porifera. Sponges can reproduce by budding. Sponges are placed in kingdom animalia because they are unable to make their own food, made of more than one cell and absence of cell wall. 
 
        
             
        
        
        
Answer:
This is the study of life
 
        
                    
             
        
        
        
Answer:
Thymus gland
Explanation:
it is active during puberty mostly and after slowly shrinks
 
        
             
        
        
        
Answer:
Definition (http://en.wikipedia.org/wiki/Saprophytism) Saprotrophic nutrition is a process of chemoheterotrophic extracellular digestion involved in the processing of dead or decayed organic matter. It occurs in saprotrophs or heterotrophs, and is most often associated with fungi, for example Mucor and Rhizopus. (
Explanation: