The answer would be true due to the fact that observing is really just looking at the situation, defining it and receiving data, whereas it can be used to add info supporting the problem you wish to explain. Though it can be false while observation can just be looking over an item or object to find data to help you answer your already defined problem.
On or about day 14 of the ovarian cycle, ovulation occurs
Hope this helps C:
Answer:
Agriculture and urbanization both have the goal of expanding human value of living.
Explanation:
Yes it can turn into sedimentary or metamorphic rock
The correct answer is cyanobacteria (ancient cyanobacteria).
The huge concentration of oxygen in the atmosphere is believed to have been initially produced by the actions of ancient cyanobacteria. They are usually observed as symbionts with a number of another group of species, like coral, lichens (fungi), Azolla (pteridophytes), angiosperms, and others.
The atmosphere of oxygen was generated by various cyanobacteria at the time of Proterozoic and Archaean periods.
