Answer:
Your answer is D.
Explanation:
Hope that answers your question.
Biohazard is a risk to human health or the environment arising from biological work, especially with microorganisms.
Bio means of life or a living thing
Hazard means danger or risk
Yellow [YY] And Green [yy] would be [Yy] (Still yellow)
I think the government should have a plan or procedure in place to deal with the movement of the continents so as to curb species extinction.
<h3>What is Climate?</h3>
This is referred to as the atmospheric condition of a place for a long period of time.
Drifting of continents leads to a new climate being present which will affect life forms. If they are unable to adapt they may all die out and go extinct thereby disrupting the ecosystem which is why a plan should be put in place.
Read more about Climate here brainly.com/question/17922964
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Answer:
Ligand-receptor interaction is the first interaction that triggers cell signalling.
Ligands are the hormones, drugs or neurotransmitters that specifically bind with receptors present in cell surface to initiate cell signalling. Ligand binding to the receptor is reversible. Binding of the ligand to the receptor can activate or inactivate receptor. Activation may lead to cell signalling pathways. Inside cells, there are secondary molecules which on activation starts a cascade of reactions. which in-turn regulate the function of the ligand molecule.
At first, the activated receptor relates with G proteins molecules in the cell.
before the ultimate physiological effect of the ligand on the cell's behavior is produced Therefore, the cellular signaling starts as soon as the first messenger (the ligand) binds to its receptor.
hope this helps
