Answer:
These cells are Eukaryotic and are autotrophic
Explanation:
These are the cells of onion. An oinion is a plant and because it is a plant it is autotrophic meaning they make their own food. Also plants are eukaryotic which means they have a nucleus.
 
        
             
        
        
        
Hello There!
It would be a Warm Front.
Hope This Helps You!
Good Luck :) 
- Hannah ❤
        
                    
             
        
        
        
I believe it’s called perculation
        
             
        
        
        
A metamorphic rock is a type of rock which has been changed by extreme heat and pressure.  so must be option D
        
             
        
        
        
Answer:
At 0 years, an event took place which is known as metamorphosis of igneous rock i.e., formation of igneous rocks from melted magma.
Strontium-90 is a radioactive element which undergoes beta decay to form yttrium-90. It has a half life of approximately 28 years and decay energy of 0.546 MeV. This radioactivity is used by geologist to estimate the age of the rock, fossils, meteorites etc. Other radioactive elements used by the geologists are carbon-40, potassium-40 etc.
Radiometric clock is set when the rock was formed in the past i.e., the moment when an ingenious rock was solidified from molten magma.