What type of microscope can reveal details1000 times smaller than those visible in light...
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What type of microscope can reveal details1000 times
smaller than those visible in light microscopes.
Electron microscopes
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Name an organisms classified as a prokaryotes.
bacteria
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An ____________is a group of organs that work
together to perform a specific function.
organ system
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A group of similar cells that perform a particular
function is called
tissue
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Which organelle would you expect to find in plant cells
but not animal cells?
chloroplast
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All cells contain 3 things. What are they
Genetic material (DNA), Cell membrane and cytoplasm
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Which means of particle transport requires input of energy from the
cell?
active transport
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What structures are involved in cell movement?
microtubules and microfilaments
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Who used a compound microscope to see chambers
within cork and named them “cells”?
Robert Hooke
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Unlike the cell membrane, the ____________is a rigid
structure.
cell wall
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__________ occurs because molecules
constantly move and collide with each other.
diffusion
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What type of microscope can produce three-
dimensional images of a cell’s surface?
scanning electron microscope
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What term describes the relatively constant internal physical
conditions of an organism?
homeostasis
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German physician, who concluded that new cells
can be produced only from the division of existing
cells.
Rudolf Virchow
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The function of the ________________regulates the movement of materials
into and out of the cell
cell membrane
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Which organelle converts the chemical energy stored in food into compounds that are more convenient for the cell to use?
mitochondrion
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What advance in technology made the
discovery of cells possible?
the microscope
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German botanist, who concluded that all plants are made of
cells.
Matthias Schleiden
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He used a simple microscope to observe pond water and saw microorganism under greater
details.
Anton van Leeuwenhoek
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function of the ___________helps a cell
keep its shape
cytoskeleton
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The primary function of the ____________ is to support
and protect the cell.
cell wall
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The cell membrane contains channels and pumps that help move materials from one side to the other. What are these
channels and pumps made of?
proteins
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Which organelle breaks down organelles that are no longer
useful?
lysosome
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Which 2 organelles are involved in energy conversion?
mitochondria and chloroplasts
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list the levels of organization in a multicellular organism
from the simplest level to the most complex level?
cell, tissue, organ, organ system
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The diffusion of water across a selectively permeable membrane is
called
osmosis
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Which structure makes proteins using coded
instructions that come from the nucleus?
ribosome
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Ribosomes that synthesize proteins are found on the __________ endoplasmic
reticulum.
rough
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A ______________microscope allows light to pass through a specimen and focuses it using two lenses to form an image.
light
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Moving materials from an area of low concentration to
an area of high concentration requires
______ transport.
active
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What are the three major principles of the cell theory?
1. All living things are made up of cells.
2. Cells are the basic units of structure and function in living things.
3. New cells are produced from existing cells.
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What provides the energy for active transport to take place?
ATP
Adenosine triphosphate
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Describe the arrangement of the molecules in the phospholipid bilayer of the cell membrane.
(include hydrophilic and hydrophobic)
The molecules are arranged in a double layer. The phosphate heads of the molecules form the outer surfaces and are
hydrophilic( water-liking, and the fatty acid tails form the inner part of the membrane and are hydrophobic (water-fearing).