The divergent plate boundaries
Answer:
Cells in a large multicellular organism communicate with each other by chemical signals. These signals are passed from one cell to another. To receive and respond to a chemical signal, a cell must have a <u><em>receptor</em></u> for that chemical.
Explanation:
To generate a physiological response, all cells in the body have special proteins called receptors. These receptors are involved in detecting a chemical signal and generating a response. The receptors are specific for different kind of chemical signals. For example, a dopamine receptor will bind a dopamine molecule whereas an insulin receptor will be able to bind an insulin molecule. Apart from chemical signals, some cells might also respond to mechanical signals.
Axolotl is a Mexican salamander or Abystoma Mexicanum. It can survive as it grows through True Cellular Regeneration. This is the ability to regenerate cells, tissues and organs without the need of transplants. T<span>he axolotl is unique in the sense that it can renew several structures like limbs, jaws, tail, spinal cord, skin throughout their lives. They can even receive transplanted organs from other individuals and accept them without difficulty.</span>
Answer:
Pulmonary circulation
Explanation:
The pulmonary artery is a big artery that comes from the heart, so it splits into two main branches, and brings blood from the heart to the lungs.
The genetic code is based upon reading 3 bases at a time
there are 4 nucleotides bases in DNA and 20 amino acids .
In order to incorporate all the amino acids we consider 3 bases in genetic code
4 x 4 x 4 = 64
if we would take 2 bases -
4x4 = 16 that would leave out 4 amino acids without a code .
