Answer:
With alleles 'A' and 'a' there are three possible genotypes AA, Aa and aa
Explanation:
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Producers are green plants or photosynthetic organisms that are the basis for the other living parts of any ecosystem. Producers need to have access to light to produce food. Few producers will be found deep below a lakes surface simply because the deeper you travel under water the less light penetrates those deeper layers.
The answer (although it appears to be missing a word or two) is:
C) The cell would have to take in and use (energy, resources) in order to break the covalent bonds.
Covalent bonds are more difficult to break/create than hydrogen bonds, and thus require more energy. The advantage of hydrogen bonds to connect base pairs in a DNA strand is the ease with which they can be broken and then connect again, sort of like a zipper. The same process with covalent bonds would be more like unbuttoning and re-buttoning a shirt, it is slower and requires more energy to accomplish.
Answer:
In my opinion Citizenship is the willingness to proceed under difficult conditions
