If you are referring to the model attached, then the answer would be:
<u><em>Jane Doe</em></u>
This model demonstrates how one can categorize something based on certain information from general to specific characteristics. For example, many people have the same names, so how would we know who the person is referring to? Using specific details like the house number, building name or apartment, street and zip code will help narrow down who the letter is addressed to specifically. This is a method they use to organize organisms into specific classifications, based on specific characteristics.
The fossils that provide information on the formation of an oxygen-rich atmosphere are the stromatilites from the Precambrian era. These are layered and columnar fossils consisting mainly of cyanobacteria which were the original life form back then. These bacteria took in carbon dioxide and produced oxygen by photosynthesis as early as 2.5 billion years ago (the earth is about 4.5 billion yrs old).
Your answer is leukocytes.
Image result for Compare and contrast intracellular vs. intercellular communication
The key difference between intracellular and intercellular signaling is that intracellular signaling is the communication within the cell while intercellular signaling is the communication between cells. ... Also, within the cell, communication occurs between organelles and nucleus to carry out cellular functions.
C. protein. Nitrogen is a component of amino acids which are the building blocks of protein.
