Answer:
the correct answer is option ( B )
 
        
             
        
        
        
Answer:
Explanation:
He contributed to the discovery of cells while looking at a thin slice of cork. He then thought that cells only exist in plants and fungi. In 1665, he published Micrographia.
 
        
                    
             
        
        
        
The geologist time scale was formed when scientists studied rock layers and index fossils worldwide. With this information, they placed Earth's rocks in order by relative age. Later, radioactive dating helped determine the exact age of the divisons in the geologic time scale.
This scale is organized by the 4.6 billion years of earth's history into sections based on important changes seen in the geologic record. The largest intervals are called eons, with each eon containing many millions of years.
In precambarian time the processes that affect Earth's surface have lessened the erosion on the surface. Earth was being hit by meteorites every second. Now there is water erosion and there wasn't back then. The surface changes have lessened over time.
        
                    
             
        
        
        
Answer:
The correct answer is option - cells begin to specialize.
Explanation:
Embryonic differentiation is a process in which the cell begins to divide and to be destined to make a specific cell line different from another cell. Each differentiated cell has fate to perform a specific function in later development in the body.
The embryonic cell differentiation takes place when the cell begins to specialize which is occurs after the cleavage of a zygote which triggers the differentiation process.
Thus, the correct answer is option - cells begin to specialize.
 
        
             
        
        
        
Answer:
The correct statement is C. The pollutants will disrupt oxygen absorption in fish. 
Explanation: 
Motor oil and other fuels when dispose off in the water bodies, it causes suffocation in the marine animals and causes death. Motor oil or other fuel such as petrol, diesel etc are non polar solvent and water is a polar solvent so they are not dissolve with each other and the oil make a layer on the water surface and blocks oxygen.