Answer:
<em>True: </em><u>b) Tissue is a group of specialized cells that work together for a common  function and form organs.</u>
Explanation:
Cells are the smallest units of life, they may be either unicellular or multicellular. Unicellular organs have a single cell capable of carrying out all of the functions necessary for its survival. Multicellular organisms are more complex, and require the work of multiple different cell types. 
Their cells become differentiated- where they undergo certain processes to become specialized, and gain maturity. Groups of specialized cell types form tissue; these each have varying functions over time. Organs consist of two or more tissue types that are specifically organized to carry out a function.
 
        
             
        
        
        
Putting a control to pollution and deforestation is effective
        
             
        
        
        
Answer:
That doesn't mean the energy is gone, it's just not where you are looking. The universe is defined as all energy and matter. It is everything. Closed system there is ...
 
        
             
        
        
        
Answer:
Photosynthesis uses carbon dioxide to make sugar and produces oxygen as a byproduct. Respiration uses oxygen to release energy from stored sugar and produces carbon dioxide as a byproduct. ... However, if the plants are growing, then over a period of 24 hours they will produce more oxygen than they consume.