Fish fossils occur in sediments deposited underwater. That could be sea bottom, lakes, or rivers. Generally, seabottom sediments are raised to the surface by tectonic uplift. Also, when sea level falls during ice ages, sea bottom sediments are exposed to the atmosphere.
        
             
        
        
        
This statement is incomplete.
"All plants give out oxygen during day and carbon dioxide during night"
Explanation :
Photosynthesis occurs only during day time.
During this time oxygen is produced . Some oxygen is used for respiration and rest of oxygen is diffused out into air.
Carbon dioxide produced during day time by respiration is used in photosynthesis.
But at night time, no photosynthesis occurs  and hence no oxygen is produced oxygen from air diffuses into leaves to carry out respiration and carbon dioxide produced by respiration diffuses out into air.
Hence Respiration occurs day and night .. Hence Carbon dioxide  is emitted  all the time....
Plz Mark Brainliest trying to reach expert
 
        
             
        
        
        
Answer:
is d. The bacteria have high genetic variability and high reproductive rates.
Explanation: