AnswersMI-Biology A-CRLab: Diffusion Across a Semi-permeable Membrane

Mitosis Answers

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1
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Mitosis is divided into phases.Which phase of mitosis is shown in the diagram?

Question illustration
A
prophase
B
metaphase
C
anaphase
D
telophase
2
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Which of the steps in this sequence of events is an example of mitosis at work?

A
A baseball hits the arm of a baseball player.
B
The player reacts quickly grabbing his arm.
C
A bruise forms where the ball hit the arm.
D
The bruise slowly disappears as the arm heals.
3

Which are replicated during interphase?

A
sister chromatids
B
chromosomes
C
centromeres
D
nuclei
4

Which statement best describes cancer cells?

A
They grow as a single layer of cells.
B
They cease to reproduce after 20–50 mitotic divisions.
C
They reproduce only when needed to replace missing cells.
D
They are not regulated by contact inhibition.
5

An example of mitosis at work is a leaf

A
turning yellow.
B
growing.
C
taking in carbon dioxide.
D
performing photosynthesis.
6

In which of these stages is mitosis most important?

A
A tiger cub is born.
B
A tiger cub learns to walk.
C
A tiger cub begins to grow.
D
A tiger cub play-fights.
7

Early in mitosis, the nucleus, nucleolus, and nuclear envelope begin to dissolve in preparation for cell division. In which stage of the cell cycle is this process reversed?

A
cytokinesis
B
interphase
C
anaphase
D
telophase
8

Scientists use tissue cultures to study possible medicines that can be used to treat cancer patients. What is one benefit of this procedure?

A
Scientists can observe how cultured cells respond to a medicine before testing it in patients.
B
Cultured cells always respond to a medicine exactly as cells in a patient’s body would.
C
Doctors can determine how to treat every type of cancer from one tissue culture.
D
One tissue culture can show how a medicine will work for every cancer patient.
9

After chromosomes are formed, during which phase of mitosis do the chromosomes attach to the spindle fibers by their centromeres?

A
anaphase
B
prophase
C
metaphase
D
telophase
10

During which phase of mitosis do the nuclear membrane, nucleolus, and nucleus dissolve?

A
metaphase
B
prophase
C
anaphase
D
telophase

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