Florida Science Grade 7

Chapter 11: Cells

Cells

1
Which one of these is an example of a virus that can affect a range of hosts?
A)the rubella virus
B)the rabies virus
C)the varicella virus
D)the rhinovirus
2
Which of these statements is supported by the cell theory?
A)Each cell in your body comes from a cell that has divided.
B)All organisms have multiple cells.
C)Only certain cells in your body divide to make new cells.
D)No organisms are composed of just one cell.
3
Which of these scientists was NOT involved in discoveries about cells?
A)Theodor Schwann
B)Carl Sagan
C)Rudolf Virchow
D)Robert Hooke
4
Edward Jenner developed the first vaccine that treated which of these viral diseases?
A)smallpox
B)herpes
C)hepatitis
D)AIDS
5
An active virus ultimately __________ the host cell.
A)destroys
B)enlarges
C)duplicates
D)ignores
6
To view extremely small organisms, which might you use?
A)an electron microscope
B)a concave lens
C)an eyepiece lens
D)a magnifying glass
7
A lysosome's membrane disintegrates when __________.
A)a cell divides
B)a cell makes food
C)a cell dies
D)a cell gets rid of wastes
8
__________ is a group of similar cells that work in unison to perform one function.
A)A tissue
B)A nucleus
C)A lysosome
D)A vacuole
9
The nucleus is usually the largest __________ in a cell.
A)organ
B)chromosome
C)tissue
D)organelle
10
If a microscope has an eyepiece lens with a power of 25X and an objective lens with a power of 50X, what is the microscope's total magnification power?
A)25X
B)75X
C)2X
D)1250X
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