The answer is 50km your wel
The correct answer is: Layer 1, layer 2, and layer 4 in all three regions.
The index fossils are fossils that are commonly used for identifying a geological period of time, and these fossils are also very wide spread, as well as having a rapid evolutionary trends.
By this picture, we can easily see that even though we have rock strata from different regions, the same layers contain the same fossil, and it is a fossil that also is rapidly evolving so has a minor change in each layer.
Answer
In the presence of oxygen two energy products are produced, these are:
1. ATP
2. NADH2
One NADH2 produce three ATP.
Conclusion:
so in the presence of oxygen the energy rich compound which is produced during glycolysis is NADH2.
All vertebrates are, by nature, in two classes : the male class and the female class. Only some invertebrates like the earthworm, water snail etc are in single class with both male and female organs in the same body.
