CELL REPRODUCTION

1
CELL REPRODUCTION

• Unit Target Observe how the structure and
  function of organisms change as they grow and
  develop.

2
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.

3
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 crisis
• b. Ability to transport nutrients
• c. Ability to remove wastes
• d. All of the above
• d.

4

• 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.

5

• During the Tootsie Roll Analogy
• What did the Tootsie Roll represent?
• Nutrients
• What did the last person in the row represent?
• A cell organelle
• What did the candy wrapper represent?
• Waste
• How did the waste leave the cell?
• Through the cell membrane

6

• What was concluded from the Tootsie Roll
  Analogy?
• Larger cells are more likely to receive nutrients
  and get rid of wastes more efficiently.
• Small cells are more likely to receive nutrients
  and get rid of wastes more efficiently.
• Cell size is unimportant in regard to receiving
  nutrients and eliminating wastes.
• B

7
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.

8

• If a volume of a 3 cm cube is calculated by
  multiplying length, width and height which unit
  would be used?
• mm2
• cm3
• mL
• cm2
• b

9

• What is the volume of a 2mm cube?
• 8mm3 (L x W x D 2x2x2)
• What is the surface area of that 2mm cube?
• 24mm2 (L x W x of sides 2x2x6)

10

• 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?
• 21

11
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?
• Nutrients diffuse faster into small cells.
• Nutrients can reach all of the organelles of a
  small cell.
• Nutrients diffuse faster into large cells.
• Nutrients can reach all of the organelles of a
  large cell.
• b.

12

• Which cell would be most likely to maintain
  homeostasis and survive?
• A cell with a 61 surface area to volume ratio
• A cell with a 21 surface area to volume ratio
• A. More surface area allows for better transfer
  of nutrients and waste.

13

• How is this large nerve cell able to get the
  nutrients it needs to maintain homeostasis?
• The tendrils create a lot of surface area.

14
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

15
DLT State the purpose of cell reproduction. (K)

• Which is not a reason for cell reproduction?
• Growth
• Repair
• Replacement of old cells
• To increase volume
• d

16
DLT Describe the structure of chromosomes. (K)

• Sister chromatids are attached to each other at
  an area called a
• a. Centriole
• b. Centromere
• c. Spindle
• d. Chromosome
• b

17

• Label the eukarytoic chromosome using the words
  centromere, chromosome, sister chromotids.

18

• How is the prokaryotic chromosome different from
  the eukaryotic chromosome?
• It is circular
• It is not in a nucleus

19

• 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

20
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

21

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

22

• 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

23
Name the stage of mitosis
Prophase
24
Metaphase
25
Anaphase
26
Telophase
27
Anaphase
28
Metaphase
29
Prophase
30
telophase
31
prophase
32
telophase
33
Anaphase
34
metaphase
35

• Cytokinesis is division of the cells
  ____________.
• Cytoplasm

36

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

37
DLT Explain how the cell cycle is regulated.
(K)

• A non-cancerous tumor is said to be benign.
• True

38

• Melanoma has a high mortality rate because
• It has a low cure rate, even when caught early
• All cancers are deadly.
• It spreads through the body through a process
  known as metastasis
• It doesnt have a high mortality rate.
• C.

39

• The disease of uncontrolled cell growth
  ______________
• Cancer

40
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

41
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

42
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.