Given what we know, we can confirm that the correct option is D, which states that "<em><u>They are used by living things as the </u></em><em><u>main source </u></em><em><u>of </u></em><em><u>energy</u></em>."
<h3>What are carbohydrates?</h3>
- They are the primary source of energy for most cells.
- They are what we refer to as sugars.
- The main example of this is glucose.
- They are formed by monomers called monosaccharides.
Therefore, we can confirm that since carbohydrates are what we refer to as sugars, which include molecules like glucose and this is the main source of energy for most cells, option D is the correct choice.
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Since the blood does not return to the heart after flowing
through the gills, pressure is not regenerated within the system before it
flows to the systemic circulation (the rest of the body). A single circulation
would experience a loss of pressure after flowing through the gas change organs
(gills of a fish) due to the high cross-sectional area presented by the
capillaries of the gills. For ectotherms like fish, this is efficient enough to
support their activity level. A fishes behavior would change in a few ways if
it had an open circulatory system. However, the most common would be the fish
would become extremely active.
Answer:
<em>The option D) 'Every cell has a nucleus that contains genetic material' is not a part of the cell theory.</em>
Explanation:
The cell theory has three main postulates which are:
- All living things are made up of a cell or different cells.
- All cells arise from pre-existing cells
- Cells are the basic unit of life.
The cell theory does not claim that every cell shall have a nucleus. The prokaryotes lack a nucleus yet still are living things. However, all cells will have genetic material in the form of DNA or RNA.
Answer:
The correct answer is option-C
Explanation:
Anastosomes is a connection between the two interconnected tubular structures like in the loops of intestine or the blood vessels.
The anastomy between the blood vessels is known as the circulatory anastomosis. The connection is formed between the arteries and arteries or between veins and veins or between arteirs and veins.
The anastosome connections forms the bypass route for the flow of blood if one pathway of blood id blocked.
Thus, option-C is the correct answer.
