Nitrogen forms NUCLEOTIDES that are part of DNA, as well as amino acids, which help build proteins. Nucleotides are building blocks of DNA.
<h3>Nucleotides and DNA</h3>
Deoxyribonucleic acid (DNA) is a double helix molecule composed of two long strands of building blocks called nucleotides.
In DNA, there are four types of nucleotides that contain different nitrogenous bases: Adenine, Cytosine, Guanine and Thymine.
The nitrogenous bases are composed of nitrogen and they are fundamental to form nucleotides (nucleotides consist of one nitrogenous base, one sugar and one phosphate group).
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For example, the respiratory system and the circulatory system work closely together to deliver oxygen to cells and to get rid of the carbon dioxide the cells produce. The circulatory system picks up oxygen in the lungs and drops it off in the tissues, then performs the reverse service for carbon dioxide.
The answer is: Create a diagram that hypothesizes ancestry.
Explanation:
Objective lenses are responsible for the primary image formation in microscopes, they are the closest part to the object, it defines the image's quality and they determine the magnification and resolution. In an optical microscope you can usually find 3 or 4 objectives (4x, 10x, 40x and 100x) but other configurations and magnifications are possible, in the image I added you can see that.
<em>To determine which objective you will use you need to consider your specimen's size and what are the smallest features in it, NA (numerical aperture) must be considered as well, this is the ability to gather light and it determines depth of focus (how much you can focus without change in the image's sharpness), brightness and resolution (smallest distance between two objects). You'll also need to identify your observation method (phase contrast, darkfield, fluorescence, etc) and in what medium is your sample.</em>
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