<span>Chemical properties, such as density, must be observed when a substance is in its natural state at room temperature and normal atmospheric pressure.</span>
        
                    
             
        
        
        
Gametophytes are photosynthetic & have root-like rhizoids.
        
             
        
        
        
Hello There!
Now, i'm not 100% sure on this but i think it is C. 
Please let me know if it is correct..i'm sorry if it is wrong.
Hope This Helps You!
Good Luck :) 
- Hannah ❤
        
                    
             
        
        
        
Answer:
1. b 2.c 3. d 4. c 5. d 6. a 7.a 8.b 9.c 10. a
Explanation:
 
        
             
        
        
        
Sexual intercourse. The developing of the female egg cells and the production of sperm cells