Download Science 7 Name: Unit 1 Cells Date: Period: ______ Sec 1.3 Cells

Science 7
Unit 1
Cells
Name: _____________________________________
Date: ______________ Period: __________
Sec 1.3 Cells Can Perform Specialized Functions
Review
1. Fill in the concept map for cells.
2. Organisms can be classified by their cell type.
Do most organisms on Earth have one cell or many cells? _______________________
Archaea and Bacteria
3. Mark an X in the column if the description fits.
Archaea
Bacteria
Have a tough cell wall
First discovered in the 1970s
Cytoplasm has no organelles
Have no nucleus
A multicellular organism is a community of cells.
4. Circle the organ. Draw a triangle around the single cell. Draw a square around
the tissue.
5. Identify each sketch as either a cell, a tissue, an organ, an organ system, or
an organism.
Cat
________________
Plant Cell
_____________
Heart
_____________
Flakes of Skin
_____________
6. Organisms can be classified by their cell type. Most organisms on Earth are single-celled. Organisms are
grouped into three domains according to the characteristics of their cells. Fill in the name of each domain in
the chart below.
Domain
Description
multicellular and unicellular organisms whose cells have a nucleus
and other
organelles
unicellular prokaryotes
unicellular prokaryotes that live in extreme environments;
genetically different
from bacteria
7. Cells in multicellular organisms specialize. When a cell is specialized, it means that the cell and all of its
organelles are organized to do a specific job. Name two specialized cells in your body, and describe
their specific jobs.
a._______________________________________________________________________________
b. ________________________________________________________________________________
8. A multicellular organism is a community of cells. How cells work together and interact depends on the
organism. Plants and animals have levels of organization. Complete the flow chart below to describe the
organization of a multicellular organism from a cell to a whole organism.
cell  ___________________  ___________________  ___________________  organism