Question

The structures of most of the cell organelles
like the endoplasmic reticulum, mitochondria,
chloroplasts, Galgt apparatus, lysosomes,
perusomes and centrosomes were known
and understood only after using an electron
microscope .
Fig. 2.4 : Electron Microscope
TEST YOURSELF
1. Fall in the missing words:
() A cell is the
and functional unit of life.
and
are unicellular organisms.
(187) A Dutch lens maker named
was the first to observe and describe minute
organisms present in rainwater under his simple microscope.
(iv) He was an
scientist, and observed thin slices of
under his
microscope.
(v) He observed
structure and named the
as
(vi) The term 'cell was given by
2. State whether the following statements are True (T) or False (F):
(i) Viruses are an exception to cell theory.
(ii) The simple microscope consisted of a single lens.
(iii) Light microscope was used to understand the structure of cell organelles.
(iv) Electron microscope is the oldest type of microscope.
(v) The term 'cell was given by Robert Brown.
20000
.
Cig
and Comnosition
Cell Size​

Answer 1

dadqdx zvxnxndnfjflypupupuou