Answer:
b.) because its the only thing he can really control and it stays the same through out the entire experment
Explanation:
<span>A
trophic level pertains to the position of an organism in the food chain. Humans
are the mos dominant organism that belong
to more than one trophic level. When we eat plants we become the primary consumers
but when we eat meat we can become the secondary or the tertiary consumers.
Birds are also organisms that belong to more than one trophic level. When birds
eat seeds they become the primary consumer, but when they eat insects they
become the secondary or even the tertiary consumers. </span>
The amniotic egg, which is present in animals such as reptiles, birds, and mammals, is a good example of homo-logy.
<h3>What is homo-logy?</h3>
The term 'homo-logy' makes reference to the same evolutionary origin (ancestor) for a given structure.
A structure and/or sequence is homo-logous when it derives from the same evolutionary ancestor.
Conversely, an analogy means that the structure and/or nucleotide sequence do not share an evolutionary origin.
Learn more about homo-logies here:
brainly.com/question/13553174
The force that the pin exerts on the bowling ball is -15.0 N. This is because of Newton's 3rd law (every action has an equal but opposite reaction).
Hope this helped :)
