<span>Organisms play an important role in the water cycle. As you know, most organisms contain a significant amount of water .</span>
From top to bottom, I believe the answers are:
Biologist
Chemist
Geologist
Hydrologist
Yes it is necessary for the production of apt in your cells because apt needs oxygen to form correctly.
Answer:
Index fossils
Explanation:
The index fossils are the fossils that come in very handy for the geologists when it comes to identifying or dating rock samples or other fossils. The reason for this is that the index fossils have already been dated. They are fossils that are very commonly found, wide dispersed, are easy to be identified, and are limited to only a certain geological period. These characteristics make them an excellent indicator for the dating of the rock layers in which they are found, or the fossils found in the same layers with them, without conducting further examinations.
