Chapter 5 Asexual Reproduction

Question 1

Animals & their skin

Answer 1

Shedding skin:
-Snakes

Need help to get rid of their skin:

• Amphibian B.taitanus
• The babies chew off the mother’s skin as lunch
• Found in Kenya, Africa

Question 2

B.titanus: Types of teeth

Answer 2

• Spoon shaped for scraping
• Spiked points for piercing
• Grappling hook designed so it can stay attached to mother

Question 3

Do cells divide at the same rate?

Answer 3

No. They divide on different rates, and the rate depends on the function. Skin cells endure a lot of wear and tear, so they divide really fast

Question 4

What cell divides the fastest? What cell divides the slowest

Answer 4

-

Question 5

How are stains on your hands cleaned?

Answer 5

-Sometimes not by soap and water, but skin sheds instead

Question 6

What controls checkpoints?

Answer 6

Genes

Proteins????

Question 7

Rate of red blood cells’ division

Answer 7

Every 120 days

Question 8

Skin cells’ division rate

Answer 8

Every 20 days

Question 9

Brain cells

Answer 9

Every 30-50 years

Question 10

Stomach lining cells’ division rate

Answer 10

Every 2 days

Question 11

Intestinal lining cells’ division rate

Answer 11

Every 3 days

Question 12

Liver cells’ division rate

Answer 12

Every 200 days

Question 13

When does your body growth slows?

Answer 13

After puberty

Question 14

As an adult, what types of cells continue dividing and what doesn’t?

Answer 14

• Intestinal cells and stomach cells; cells that takes a lot of wear and tear
• Muscle cell and nerve cell usually doesn’t continue to divide

Question 15

Why won’t muscle cells and nerve cells continue to divide when you are an adult?

Answer 15

Needs to be searched up

Question 16

Where does most of the dust in our house came from?

Answer 16

70% of it comes from dead human skin cells

Question 17

Brain damage is when…?

Answer 17

• Pathway get damaged, new pathways?????

- research

Question 18

Cells make up ~, ~ makes up ~, ~ are part of ~?

Answer 18

Tissues, organs, and body systems

Question 19

Do organs have only one type of tissue?

Answer 19

No, they can have 2+ tissues

-need example!!!!

Question 20

Cell cycle

Answer 20

Interphase, mitosis, and cytokinesis are the three stages of cell cycle

Question 21

Interphase: short summary

Answer 21

• The longest stage where cells are carrying out its daily functions
• Prepares for reproduction by doubling the material

Question 22

Mitosis: short summary

Answer 22

• Usually the shortest
• Divides the duplicated contents of cell’s nucleus into two equal parts(2 daughter cells identical n equal to parent cell)

Question 23

Cytokinesis: short summary

Answer 23

-Separates the two nuclei and cell contents into two daughter cells

Question 24

Interphase: Growth and preparation

Answer 24

• Increases in size n makes the proteins necessary for the cell to function
• Some organelles began to duplicate

Question 25

Interphase: DNA Replication: summary

Answer 25

- Temporarily has two complete sets of DNA - Controlled by enzymes - Can involve up to 3X10^9 base pairs of DNA

Question 26

Interphase: DNA replication: Process

Answer 26

- Enzymes uncoil the double helix DNA(becomes straight) - New bases combine with each strand of DNA - 2 identical DNA are made

Question 27

Interphase: Continued growth and preparation:

Answer 27

- After DNA replicates, cell continues to grow and makes materials(ex.protein) for the new cells - Chromatin contains loosely coiled DNA so it can be copied into mRNA so proteins can continue to be made - Organelles such as mitochondria and chloroplasts will be duplicated at this stage

Question 28

What does the chromosomes look like as the nucleus prepares to divide?

Answer 28

Visible as X

Question 29

Sister chromatids

Answer 29

-Strands of identical duplicated DNA joined together to form half of the chromosome

Question 30

Centromere

Answer 30

- Center part of X | - Holds the sister chromatids together