The answer should be D because if thats one of your answers on your tests and you missed it, then i would recemend studing. D is the answer because if organisms die, then new ones grow.
"Water quality" may include the amounts of dissolved oxygen
and the levels of algal growth, pollutants which may be present and the pH level. Water quality effects also which types of organisms can
survive in a body of water.
Shellfish require a high level
of dissolved oxygen and their abundance is an indication of good water quality. Shellfish are sensitive to changes in the ecosystem and they cannot easily escape changes in the water quality. These are one of the reasons why shellfish are good indicators of water quality.
It is true that the collecting tubules merge to form the ducts of Bellini.
Papillary ducts or collecting ducts or the renal collecting tubules were formerly known as the ducts of Bellini. They are structures which are present in the distal portion of the collecting ducts in our kidneys.
These ducts are formed when collecting tubules merge. They receive the renal filtrate, which is the precursor to urine, from a number of medullary collecting ducts and it empties into a minor calyx. These ducts regulate the reabsorption of water and also balances the electrolytes.
Hence option a is the correct option.
To learn more about collecting tubules here
brainly.com/question/15210961
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ok yeah we know you know that bro I know it's fun right
