The precambrian era makes up about 90% of the earths history, but there was little to no living organisms at the time other than microscopic ones. The first eukaryotes were found in the cambrian period after the precambrian period, not only that but at the end of the precambrian era in the Proterozoic era there was a mass extinction of about 70-80% of all living organisms
Answer:
Attached to hemoglobin.
Explanation:
The oxygen is important for the cellular functioning of cell. The carbon dioxide must be move out of the cell and oxygen should reach to each and every cell of the body.
Hemoglobin molecule has the ability to binds with the four molecules of oxygen. The oxygen moves in the body by binding with the hemoglobin molecules present inside the red blood cells.
Thus, the correct answer is option (a).
a graphite neutron moderator
Answer:
1) 945000 m
2) 6.11 miles/hour
3) 3.52 seconds
Explanation:
1. Speed is the time rate of change of distance, it is the ratio of distance to time. Speed is given by the equation:
Given that:
Time (t) = 9 hours and Speed (S) = 105 km/h
2) Time (t) = 0.9 hours and distance (d) = 5.5 miles
3) Acceleration it is the ratio of velocity to time. Acceleration is given by the equation:
Given that :
a = 4.2 m/s² , u = 18.9 m/s and v = 33.7 m/s
