Oxygen and carbon
A human body cell, also a skin cell, has two genomes: two sets of 23 chromosomes.
iron
there is 148 levers in the human body
Structural proteins are fibrous. Some examples of these are: skin, fur, hair, wool, claws, nails, hooves, horns, scales, beaks and feathers.
Not sure exactly what you mean, there are hundreds of different proteins, but in nutrition you have: first class proteins: proteins that contain the eight essential amino acids that cannot be produced in the human body and so must be eaten, they are usually found in meat. second class protein: proteins that are made up of non- essential amino acids, those that can be produced in the body.
All proteins are made up of chains of amino acids, the building blocks for protein. When you eat "cow muscle protein," your body breaks the proteins down into amino acids, which are absorbed in the small intestine and then utilized for your body to produce the proteins that we require. Many proteins, however are identical in the cow and human. (i.e. actin and myosin, two proteins that allow for muscle contraction)
There are two: DNA and RNA.
Oxygen and carbon
Carbon, it is found in every human cell and as diamonds and graphite
the two are bacteria and white blood cells
A human body cell, also a skin cell, has two genomes: two sets of 23 chromosomes.
iron
The two main functions of the proteins found in the plasma membrane are transport and inter-cellular communication. There are so many other roles that proteins play in the cell.
One limitation of a physical model is that a model of a human body may look like a human body, but does not act/work like a human body does.( sorry only found one limitation )
Two main nutrients found in autotrophs include carbohydrates, and proteins
There are two kidneys in human body. I