3. Cell theory was given by (a) Schleiden and Schwann
(b) Virchow
(c) Hooke
(d) Haeckel
4. Cell arise from pre-existing cell was stated by
(a) Haeckel
(b) Virchow
(c) Hooke
(d) Schleid
6. Organelle without a cell membrane is
(a) ribosome
(b) nucleus
(c) mitochondrion
(d) chloroplast
Right answer= brainlist+follow
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