DNA is made up of the individual units called Nucleotides.
I think its B but I'm not sure .. sorry
Answer:
it means They have been tampered with by chemicals steroids its science that makes foods bigger and tastes better.
Explanation:
they take the things that make the food and put all types of things in them to make then tastes better like apples they modify those to make them bigger and juicier.
Answer:
1. Signaling molecule
2. Signaling receptors
Explanation:
Hormones, growth factors, neurotransmitters, etc. serve the function of signaling molecules for cells. These molecules are released by one cell and bind to the receptors present on/in the target cells to elicit the desired response. Thereby, the signaling molecules serve in cell-cell communication.
For example, insulin hormone synthesized and released from beta cells of pancreas binds to its cell surface receptors present on the surfaces of liver cells and muscle cells to stimulate the uptake of the glucose from the blood.
Likewise, neurotransmitters released from the presynaptic neuron bind to receptors present on the membrane of postsynaptic neuron and serve to carry the nerve impulse to the postsynaptic neuron.
