Bell Ringer

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Cells form tissues, tissues form organs, and
organs work together in organ systems.
All of the cells, tissues, organs, and organ
systems form an organism.
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Lesson 1 Main Idea Review
What is the main difference between the ways
unicellular and multicellular organisms are
organized?
Unicellular organisms perform functions on their
own. Multicellular organisms have special cells,
tissues, and organs to do tasks.
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Lesson 1 Vocab a Review
___________ is able to use the energy in
sunlight. Similar cells working together at the
same function form a ___________. A ___________
is the smallest unit of living things that can
carry out the basic processes of life. A group
of tissues working together to perform a
specific function form an ___________.
Chlorophyll
cell
tissue
chlorophyll
organ
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Lesson 1 Vocab b Review
Organs that work together to perform a certain
function make up an _____________. _____________
organisms are made of more than one cell. An
_____________ is a living thing. _____________
organisms are made of a single cell.
Multicellular
Unicellular
multicellular
unicellular
organ system
organism
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organ system (ôrg?n sist?m) A group of
organs that work together to do a certain job.
(p. 28)
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Lesson 2 Splash
classification
kingdom
species
vertebrate
invertebrate
vascular
nonvascular
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Lesson 2 a
Scientists classify organisms by sorting them
into groups according to shared characteristics.
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