A. many shellfish are filter feeders that absorb toxins from the water is the correct answer.
Explanation:
shellfish are filter feeders.
shellfish filter water by absorbing particles and toxins present in the water, they maintain the water quality by pumping the water with the help of their cilia that cover their gills.
Shellfish need a large amount of dissolved oxygen and their excess is a sign of the good quality of water.
There are different types of shellfish such as crab, clams, oysters, crayfish, and mussels.
thus option(A) many shellfish are filter feeders that absorb toxins from the water is the correct answer.
Because if you look at the pattern and location of each shading you cant tell that they are the exact same. No 2 people have the same fingerprint hence that has to be from the same person.
An undifferentiated cell is such as that in a blastocyte. They are multipotent and can differentiate into any type of cells. The cells of the mass begin to have their gene differentially expressed (due to differential silencing of particular genes) hence the cell become determined. They become well organized into tissue such as skin and other organs.
