Bobs is the answer I found it on ege
The answer is Neogene
Explanation:
It cannot be Cenozoic because that is an era. Not a period. Paleogene, Neogene, and Quaternary (our current period) are all periods within the Cenozoic Era (our current era). On the geologic time scale, there are Eras, Periods, and Epochs (and a few more classifications). Humans first appeared in the Miocene epoch which is an epoch in the Neogene period (in the Cenozoic era).
This is why the answer is Neogene.
Hope this helps...
Carbon dioxide and water are known as byproducts. Please take note that respiration and photosynthesis are basically the exact opposite of each other. Respiration takes diatomic oxygen or simply O2 from the atmosphere and changes it with carbon dioxide or CO2. On the other hand, photosynthesis takes out CO2 from the atmosphere and changes it with O2.
1. two points
2.respiratory and organs
3.heart and heart
4.homogenous process/system
