The oldest fossil evidence that geochemists have been able to find in deposits in Pilbara, Australia, and South Africa have been dated to 3.5 bya. In addition, organic compounds that may be the result of those produced by organisms have been dated, also in Greenland, to 3.8 bya.
        
             
        
        
        
Dilated cardiomyopathy is a heart disease which causes the heart chambers to thin and stretch , growing larger. It make it harder for the heart to pump blood to the rest of the body.
Extensive molecular alteration is failing heart at single cell resolution by single nucleus RNA which is nearly 600,000 nuclei in left .It occurs when heart's blood pumping Chambers's chambers enlarge or dilated. It occurs because the heart's walls became thickened , which makes it harder for the heart to pump blood. 
when hypertrophy cardiomyopathy , ventricles size remains normal and thickening of the walls may block blood flow out of ventricles. This happen by progressing to dilated cardiomyopathy is rare.
To learn more about single nucleus RNA here
brainly.com/question/21965985 
#SPJ4
 
        
             
        
        
        
The answer for this question is true.
        
             
        
        
        
Explanation:
<u>(</u><u>Ans - </u><u>4</u><u>)</u>
(a) 1000 kg/ m^3 
(b) 
1) sink
2) float 
3) sink
4) just float
(c) New density = 2 g/cc since both mass and volume of rock are halved. 
(d) Ice floats because water in solid state undergoes hydrogen bond formation, which reduces its density and it starts to float.