(c) Blind spot
Blind spot is the part where the optic nerve passes out of the retina. Photoreceptors are absent from this region.
Briefly describe the structure of the following:
(a) Brain
(b) Eye
(c) Ear
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.
Name the components of the formed elements in the blood and mention one major function of each of them.
Name two cell-organelles that are double membrane bound. What are the characteristics of these two organelles? State their functions and draw labelled diagrams of both.
Multicellular organisms have division of labour. Explain.