If a fetus's spine develops before its fingernails, this represents proximodistal development, characterized by

Answer;

-Development from the head down.

If a fetus's spine develops before its fingernails, this represents proximodistal development, characterized by development from the head down.

Explanation;

-Proximodistal development is the progression of motor development radiating from the center of an organism to the periphery. The classic example is a child learning to move her shoulders before learning to control fine finger movement.

-Proximodistal development refers to growth and development that occurs from the head down. For example; an infant can use their arms (gross motor skills) to begin to reach for a toy before they can properly use their fingers (fine motor skills) to pick up the toy.

it has to be understood that the sea water contains a huge amount of sodium and chlorine ions and if they enter the cell of the atlantic cod fish, the cell will shrivel and the fish will die. to avoid such a condition, the fish uses active transport for the purpose of removing the ions against the gradient.

explanation:

the atlantic cod is not a maritime osmoconformer. its native application of salts is less than that of the seawater it lives in. it is continually falling water from the gills to the ocean via osmosis.

countering that, the fish is going to be swallowing seawater. but since its internal collection of salts is lower than seawater, the fish will want to go free of excess salt, and since that's going upon a gradient, then active transport, requiring energy, must be used to pump out the salt. much marine fish use the organs to filter out the salt and these fish discharge very straight urine.

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