<span>Do you mean what elements make up carbohydrates? That would be carbon, hydrogen, and oxygen.
Or, do you mean what do we call the units of a carbohydrate polymer? That would be a monosaccharide.
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Grazing animals such as deer are primary consumers.
B. community
hope this helps;)
The Earth was first considered habitable when we discovered that it was Microbial organisms that started the process. I would go with D.
<span>a. Fish have a single central heart; earthworms have several hearts.
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Multi cellular organisms are made up of billions of cells each specialized to a unique role and these cells are organized into structural and functional units such as tissues and organs.
For each cell and organ to function optimally, it requires oxygen and nutrients and needs carbon dioxide and metabolic waste taken away in a continuous, never ending process.
<span>A mechanism is needed to accomplish the important function of transporting the relevant materials to and from the cell. The circulatory system fits this bill splendidly. It is a specialized organ system which allows blood and lymph to flow through the entire body carrying nutrients such as glucose, amino acids and electrolytes as well as oxygen to each cell, at the same time carting away carbon dioxide and all sorts of metabolic waste over to excretory organs to be expelled from the body.
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