Cancer grading is based on a. metastasis. b. local invasion. c. cell differentiation. d. tumor size.

The correct answer is - option B.

Explanation:

Grading is the method of classifying the cells that are cancerous. The grades are provided to such cells is cell differentiation that means how different the cells from the normal cells and how fast these cells are spreading and growing.

Pathologist grade the cancer cells on there differentiation from the normal cells as grade 1 with well, grade 2, moderately differentiated, grade 3 with poorly and in last not able to detect the differentiation in grade 4.

Thus, the correct answer among options are - Option B.

b, acidosis

acidosis is when the human body attempts to return the bloods ph levels back to normal when the blood is acidic

organisms that lack symmetry are called asymmetrical and belong to phylum porifera/sponges.

organisms with specialized stinging cells belong to phylum cnidaria. stinging cells are called cnidoblast cells.

cnidarians show two morphological forms : polyp (sessile) and medusa (mobile)

filter feeding is observed in porifera members.  

alternation of generation is observed in coelenterata or cnidaria. there is alternation of asexual polyp form and sexual medusoid form. it is also referred as metagenesis.