Answer:
It is the reason the sky is blue
Explanation:
There are all sorts of ways to reconstruct the history of life on Earth. Pinning down when specific events occurred is often tricky, though. For this, biologists depend mainly on dating the rocks in which fossils are found, and by looking at the “molecular clocks” in the DNA of living organisms.
There are problems with each of these methods. The fossil record is like a movie with most of the frames cut out. Because it is so incomplete, it can be difficult to establish exactly when particular evolutionary changes happened.
Modern genetics allows scientists to measure how different species are from each other at a molecular level, and thus to estimate how much time has passed since a single lineage split into different species. Confounding factors rack up for species that are very distantly related, making the earlier dates more uncertain.
These difficulties mean that the dates in the timeline should be taken as approximate. As a general rule, they become more uncertain the further back along the geological timescale we look. Dates that are very uncertain are marked with a question mark.
Answer:
1.8 pounds of Nitrogen per year; (based on 1000 square feet per application) for cool season grasses.
Explanation:
The above application shows an average of 0.9 pounds of inorganic and organic nitrogen per 1000 square feet per application . Therefore not more than 0.9 pounds of nitrogen will be needed per application.And for a whole year 1.8 pounds of Nitrogen per year will be needed.
This calculation was based on 1000 per square.But most lawn are not 1000 per square, therefore calculation can be done using the 1000 per squares as the reference point .
AMMONIA and its solutions, AMMONIUM NITRATE AND UREA (which is organic source)<u>are the sources of this Nitrogen</u>.
Urea is non -explosive in nature and solid. However, ammonia and ammonium Nitrate are both explosive.
Being original , it’s not really creative
