The gravity is changing in space so everything moves around
        
             
        
        
        
Animals can be classified into two main groups:vertebrates and invertebrates<span>. The main difference between </span>vertebrates and invertebrates<span> is that</span>invertebrates<span>, like insects and flatworms, </span>do<span> not</span>have<span> a backbone or a spinal column. Examples of</span>vertebrates<span> include humans, birds, and snakes. hope this helped</span>
        
                    
             
        
        
        
Answer:
He did research in genetics.
Explanation:
Genetics is qualities, hereditary variety, and/or heredity in living creatures. It's the largest field of science, however, meets every now and again with numerous other life sciences and is firmly connected with the investigation of data frameworks.
 
        
             
        
        
        
Lichens and algae I believe
        
             
        
        
        
Answer:
I think they work together to create tissue
Explanation: