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7.2 What Is Life? (part 1)
Test Description: First 10 questions to chapter 2 test
Instructions: Answer all questions to get your test result.
1) What is the total magnification of a microscope with two lenses when one lens has a magnification of 15, and the other lens has a magnification of 30?
A
30
B
450
C
15
D
45
2) Which of the following statements is part of the cell theory?
A
Only plants are composed of cells.
B
All cells are produced from other cells.
C
Cells can be produced from nonliving matter.
D
Cells are one of several basic units of structure and function in living things.
3) How does magnification occur in an electron microscope?
A
Light is changed into electrons by a convex lens.
B
Light is reflected by an electron beam.
C
An electron beam makes the object become larger.
D
An electron beam creates an image.
4) Which of the following statements is NOT part of the cell theory?
A
Cells are the basic unit of structure and function in living things.
B
All living things are composed of cells.
C
Only animals are composed of cells.
D
All cells are produced from other cells.
5) How does the lens of a light microscope work?
A
The reflection of each concave lens makes the object appear larger.
B
Each convex lens bends light to make the object become larger.
C
Each convex lens bends light to make the object appear larger.
D
Each concave lens bends light to make the object appear larger.
6) What does the term resolution refer to?
A
how many lenses a microscope uses
B
how sharp an image is
C
how big an image can be
D
how much light is needed to see an image
7) What is the function of a cell membrane?
A
to perform different functions in each cell
B
to control what enters and leaves the cell
C
to support the cell
D
to form a hard outer covering for the cell
8) Which organelle is the control center of a cell?
A
mitochondrion
B
nucleus
C
ribosome
D
chloroplast
9) Cells in many-celled organisms
A
all look the same.
B
are often quite different from each other.
C
are the same size in every part of the organism.
D
all have the same structure.
10) Specialized cells are found only in
A
bacteria.
B
single-celled organisms.
C
animals.
D
many-celled organisms.
*select an answer for all questions
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