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Fill-in-the-blank flashcards covering spontaneous generation, biogenesis, major experiments, microscope types, key scientists, and the three postulates of Cell Theory.
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The ancient idea that life could regularly arise from non-living matter is called __.
spontaneous generation
The principle that all life today arises only by the reproduction of pre-existing life is known as __.
biogenesis
In Francesco Redi’s experiment, covering the meat with gauze prevented the appearance of __.
maggots
Louis Pasteur’s 1862 experiments with microbes conclusively disproved __.
spontaneous generation
Robert Hooke coined the word __ after observing cork through a microscope in 1665.
cell
A microscope that projects visible light through a specimen is called a __.
light microscope
A microscope that uses a beam of electrons and can resolve objects as small as 0.2 nm is the __.
electron microscope
A __ electron microscope (SEM) is used to study detailed architecture of the cell surface.
scanning
A __ electron microscope (TEM) is especially useful for exploring the internal structure of a cell.
transmission
Anton van Leeuwenhoek, in 1676, described tiny living organisms he called __.
animalcules
Robert Brown discovered the __ in plant cells in 1831.
nucleus
Felix Dujardin in 1835 named the cell’s internal substance __.
sarcode
Jan Evangelista Purkinje later called the cell’s internal colloidal material __.
protoplasm (cytoplasm)
Matthias Schleiden stated in 1838 that all __ are composed of cells.
plants
Theodor Schwann concluded in 1839 that all __ are composed of cells.
animals
Rudolf Virchow declared in 1858 that all living cells come from __ living cells.
pre-existing
Cell Theory Postulate 1: All living organisms are composed of __.
cells
Cell Theory Postulate 2: The cell is the basic __ of life.
unit
Cell Theory Postulate 3: Cells arise only from __ cells.
pre-existing
The invention of the __ made the development of Cell Theory possible.
microscope
Because of harsh early-Earth energy sources like lightning and UV radiation, conditions for __ may once have existed even though none occur today.
spontaneous generation
A cell is the lowest level of structure that can perform all activities required for __.
life
The most familiar type of microscope that students first learn to use is the __ microscope.
light
The phrase “life-from-life” is another way to describe the principle of __.
biogenesis
The scientist credited with first observing red blood cells and sperm cells was __.
Anton van Leeuwenhoek