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7th Grade Science - Chapter 3 -Cells
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1.
a cell with a nucleus
eukaryote
2.
a cell without a nucleus
prokaryote
A cell's nucleus contains DNA, which
carries genetic material with
instructions
for how to
make proteins
A group of cells with the same function
make up
a tissue
A large vesicle that aids in digestion
within plant cells the way lysosomes do
is called
a vacuole
a protective layer that covers the cell's
surface and acts as a barrier
cell membrane
An organ consists of
two or more
tissues
an organism made up of cells that have
a nucleus enclosed by a membrane as
well as membrane-bound organelles
eukaryote
an organism that consists of a single cell
that does not have a nucleus or
membrane-bound organelles
prokaryote
Even simple multicellular organisms
can have
specialized
cells
genetic material in cells
DNA
in a eukaryotic cell, an organism that
contains the cell's DNA and that has a
role in growth, metabolism, and
reproduction
nucleus
In what kind of tissue does
photosynthesis take place?
Ground tissue
Larger size, longer life, and
specialization are three advantages to
being a
multicellular
organism
Most of a cell's ATP is made and stored
in the inner membrane of the
mitochondrion
One benefit of being a large organism is
that you have
fewer
predators
prokaryotes that are the smallest cells
and that have ribosomes
eubacteria
prokaryotes that include extremophiles,
organisms that live in extreme
conditions
archaebacteria
Ribosomes, the organelles that make
proteins, are found on the membranes
of the
Endoplasmic
reticulum
Robert Hooke and Anton van
Leeuwenhoek not only helped discover
cells but also
helped develop
the microscope
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small bodies in a cell's cytoplasm that are
specialized to perform specific functions
organelle
the fluid inside a cell
cytoplasm
The functions of an organism's parts are
related to those parts'
structures
The highest level of organization is the
system
the reason that most cells are limited to a
very small size
surface areato-volume
ratio
tiny, round organelles made of protein
and other material
ribosomes
What cell part supports the cell and
might be made of cellulose or chitin?
Cell wall
What part of the cell acts as the cell's
delivery system?
Endoplasmic
reticulum
What part of the cell forms a barrier
between the cell and its environment?
Cell
membrane
What part of the cell keeps the cell
membrane from collapsing?
Cytoskeleton
where DNA is stored
nucleus