Introduction to Cells
1)An English scientist, , discovered the existence of cells in 1665.

2)electron microscopes are used to examine the external parts of various organisms.

3)The ___ electron microscope is used to view the internal structure of a cell and its organelles

4) is a microscopy technique in which a beam of electrons is transmitted through an ultra-thin specimen, interacting with the specimen as it passes through it.

5)Organisms that are made up of a single cell and perform all their vital activities, like reproduction, locomotion and digestion, are called ___ organisms

6)Organisms that are made up of more than one cell are called organisms

7)Amoeba uses small finger-like projections, called .

8) is a single cell, and is built in such a way that can perform all vital activities, like reproduction, locomotion, digestion

9)The White Blood Corpuscle (WBC) is the only animal cell that changes its shape.

10)The branched structure of a neuron helps it transfer messages to all parts of the body.


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