Answer:
Co-vid-19
Explanation:
I think because since Co-vid-19 is new and nobody knows what the real side effects are, they really can't make any medicine for it. It will take time and if they do make medicine, it will take time to know how It will react and how it will react in the long term.
Answer: "reciprocal determinism" .
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<span>The tone, before conditioned to salivation, is simply a stimuli that the dog is responding to or ignoring in it's environment. Since it has no taught reactions to this sound, it is simply part of the environment the dog is in.</span>
<span>Leather shoes are made from natural polymers; raincoats are made from synthetic polymers. </span>
Answer:
What can be noticed about the ligands and their receptor is that the configuration of both coincide, as a key would with its lock, which demonstrates the specificity of a receptor by its ligand.
Explanation:
A <u>ligand</u> corresponds to a molecule considered a signal or a messenger, while the <u>receptor</u> is a protein on the cell surface, with the capacity to accept a ligand.
Ligands and receptors constitute pairs that complement each other, so that <u>each receptor can bind to a specific ligand</u>, similar to what happens with a key and a lock.
Once the ligand-receptor complex is formed, changes occur inside the cell, which define a certain effect.
