The process which is the breaking down of macromolecules is called Hydrolysis (the breaking of a bond in a molecule using water) This means that polymers are broken down into monomers. This literally means ‘Split water’ and a reaction between an ion and the water molecule is used during used during the breakdown.
Answer:
Unconditioned stimulus.
Explanation:
Classical conditioning may be defined as a type of learning procedure in which the biological procedure is used to pair up with the previous nerve stimulus. This stimulus result in the response of an individual.
The Pavlov experiment with the dog explains the process of classical conditioning. The ringing of bell (conditioned stimulus) is paired with unconditioned stimulus (meat presentation).
Thus, the meat presentation is unconditioned stimulus.
During the embryonic period, the embryo develops according to the proximodistal principle, which means that the embryo develops the center of the body before other parts are developed.
The embryo which undergo various degree of development in the womb. The embryo begins in the center of the body which houses a lot of important organs such as the heart , liver, kidney etc.
These organs require a very well defined and special development which is why development starts from this part.
The trunk of the body such as the hand and legs are developed after the center parts of the embryo is developed.
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<span>These protrusions will only bind to </span>certain<span> receptors on the host cell; they are essential for both host specificity and viral infectivity.</span>
<span>The
cells in this experiment were macrophages. These immune system cells
have many lysosomes for the destruction of bacteria and other invaders
brought into the cell via phagocytosis. The enzymes (hydrolases) that
carry out this catabolic activity are synthesized in the endoplasmic
reticulum, modified in the Golgi, and transported to the lysosomes.</span>