CELL REPRODUCTION

Unit Target: Use a model to illustrate the role of cellular

division (mitosis) and differentiation in producing and

maintaining complex organisms.

 

DLT: Compare the sizes of cells of different organisms. (R)

True or False? A 50 foot tree has larger cells than a tree that is 5 feet tall.

False. Cell size is fairly consistent between small and large organisms.

DLT: Explain the problems in maintaining homeostasis associated with increasing cell

size. (R)

Which of the following is a demand placed on large cells?a. DNA information crisisb. Ability to transport nutrientsc. Ability to remove wastesd. All of the above

d.

If the cubes to the right represent cells, which cell would have the best change of having nutrients diffuse to inner organelles?

The smallest cell because the nutrients have less distance to travel.

DLT: Calculate the volume, surface area, and ratio of surface area to volume for

cube cell models. (S)

True or False? The surface area of a cube is calculated by adding the length, width and number of sides.

False. Multiply the length, width and number of sides.

If a volume of a 3 cm cube is calculated by multiplying length, width and height which unit would be used?

a.mm2

b.cm3

c.mL

d.cm2

b

What is the ratio of surface area to volume of a cell that has a surface area of 10 cm2 and a volume of 5 cm3?

2:1

DLT: Model the effect of cell division on the problems associated with increasing cell size. (S)

What conclusion can be drawn from the agar cell lab?

a.Nutrients diffuse faster into small cells.

b.Nutrients can reach all of the organelles of a small cell.

c.Nutrients diffuse faster into large cells.

d.Nutrients can reach all of the organelles of a large cell.

b.

Which cell would be most likely to maintain homeostasis and survive?

A.A cell with a 6:1 surface area to volume ratio

B.A cell with a 2:1 surface area to volume ratio

A. More surface area allows for better transfer of nutrients and waste.

How is this large nerve cell able to get the nutrients it needs to maintain homeostasis?

The tendrils create a lot of surface area.

DLT: Define asexual reproduction. (K)

Asexual reproduction results in genetically

( alike / different ) individuals.

Is growing a new sweet potato from a sweet potato root an example of asexual reproduction?

yes

DLT: State the purpose of cell reproduction. (K)

Which is not a reason for cell reproduction?

a. Growth

b. Repair

c. Replacement of old cells

d. To increase volume

d

How is the prokaryotic chromosome different from the eukaryotic chromosome?

It is circular

It is not in a nucleus

• If a cell has 12 chromosomes, how many chromosomes will each of its daughter cells have after mitosis?

a. 4

b. 6

c. 12

d. 24

c

DLT: Describe the behavior of eukaryotic chromosomes during the stages of the cell cycle.

(K)

The cell cycle stage in which the cell grows and prepares for division by copying the DNA is called _________________.

Interphase

The stage of the cell cycle in which the nuclear material divides: _____________

Mitosis

Match each stage of interphase with its description.

G1 DNA duplicates

S Cells do most of their growing

G2 Many of the organelles required

for cell division are produced

Name the stage of mitosis

Prophase

Metaphase

Anaphase

Telophase

Anaphase

Metaphase

Prophase

telophase

prophase

telophase

Anaphase

metaphase

Cytokinesis is division of the cell’s ____________.

Cytoplasm

Truth or Baloney? Cytokinesis results in two daughter cells with identical genetic material.

True

The disease of uncontrolled cell growth: ______________

Cancer

DLT: Compare and contrast cell division in prokaryotes and eukaryotes. (R)

Is this a prokaryotic cell or eukaryotic cell?

No nucleus P

Linear chromosome E

Bacterium P

Animal Cell E

Circular chromosome P

Nucleus E

DLT: Determine and illustrate in graph form the time allotted to each stage of the eukaryotic cell

cycle. (S)

Do cells spend more time in interphase or mitosis?

Interphase

DLT: Compare and contrast the cell cycles of normal and cancerous cells. (R)

Would a cancerous cell increase or decrease the time it spends in the cell cycle?

Decrease

Why is this bad

Cells reproduce too quickly resulting in tumors.

DLT: Describe how cells differentiate to maintain a complex organism.(k)

• A cell with the potential to become any type of specialized cell is called a

• Stem cell

• True or False: Adult stem cells can become any type of cell.• False