Answer: A unicellular organism consists of 1 single egg, and a multicelluar organism consists of 2 or more eggs.
Explanation:
 
        
             
        
        
        
Answer: Integrins
Explanation: Integrins are proteins and are the principal receptors that attach the cell cytoskeleton to the extracellular matrix (ECM). Integrins by sense whether adhesion has taken place that is to say a cell can regulate the adhesive activity of its integrins from within.
 
        
             
        
        
        
Gravity
Plant roots always grow downward because specialized cells in root caps detect and respond to gravity. This is an example of a tropism. A tropism is a turning toward or away from a stimulus in the environment. Growing toward gravity is called geotropism.
        
             
        
        
        
There is not that much information, so it is impossible to answer this question. I apologise.
 
        
             
        
        
        
A drosophila mutant that has legs instead of antennae in its head is caused by a mutation in the phenotype is most likely found in the homeotic genes. The homeotic genes are the one responsible in regulating or formation of the structures in animals. This is likely where the mutation is found, causing the drosophila have legs on its head.