Fill in the blanks with suitable words :

(a) Cells were first observed in cork by ………………… in 1665.

(b) What is brick to a house is …………. To an organism.

(c) The cytoplasm and nucleus make up the ……………………………….

(d) The shape and size of a cell is related to its ………………………….

(e) The bacteria cells are ……….. to ………………micrometer in length.

(f) The smallest unit of life is a ………

(g) Tissues make up ………………..

(h) Organ systems make up an …………

(i) Cells make up …………………………………

(j) Organs make up …………………………..