The is a source of stem cells that has the characteristics of self-renewal and limited differentiation.

a. embryonic cell

b. somatic cell

c. amniotic fluid

d. heart muscle

Option c - amniotic fluid'.

Explanation:

The stem cells  which have the characteristic of self-renewal and limited differentiation are present in the amniotic fluid.

The cells present in the amniotic fluid are capable of forming a wide array of different cells. However, they are not pleuripotent, but when grown in the right environment they can form brain, liver, fat, blood vessels, bone and muscle cells.

the answer is 'Option C - amniotic fluid'.

amniotic fluid

Explanation:

chemical because it warmed up which involves temperature and it bubbled which includes changing

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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.