7.2 What Is Life? (part 1) Question Preview (ID: 10327)
First 10 Questions To Chapter 2 Test.
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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) 15
b) 30
c) 45
d) 450
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.
How does magnification occur in an electron microscope?
a) An electron beam creates an image.
b) An electron beam makes the object become larger.
c) Light is changed into electrons by a convex lens.
d) Light is reflected by an electron beam.
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 cells are produced from other cells.
c) Only animals are composed of cells.
d) All living things are composed of cells.
How does the lens of a light microscope work?
a) Each concave lens bends light to make the object appear larger.
b) Each convex lens bends light to make the object appear larger.
c) Each convex lens bends light to make the object become larger.
d) The reflection of each concave lens makes the object appear larger.
What does the term resolution refer to?
a) how sharp an image is
b) how big an image can be
c) how many lenses a microscope uses
d) how much light is needed to see an image
What is the function of a cell membrane?
a) to support the cell
b) to perform different functions in each cell
c) to control what enters and leaves the cell
d) to form a hard outer covering for the cell
Which organelle is the control center of a cell?
a) mitochondrion
b) ribosome
c) nucleus
d) chloroplast
Cells in many-celled organisms
a) all look the same.
b) all have the same structure.
c) are often quite different from each other.
d) are the same size in every part of the organism.
Specialized cells are found only in
a) animals.
b) single-celled organisms.
c) bacteria.
d) many-celled organisms.
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