The body segmentation first appeared in the phylum, Annelida (annulus meaning little ring).
Which of the following is not correct?
(a) Robert Brown discovered the cell.
(b) Schleiden and Schwann formulated the cell theory.
(c) Virchow explained that cells are formed from pre-existing cells.
(d) A unicellular organism carries out its life activities within a single cell.
Describe the digestive role of chymotrypsin. What two other digestive enzymes of the same category are secreted by its source gland?
Both lysosomes and vacuoles are endomembrane structures, yet they differ in terms of their functions. Comment.
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