B3d - Cell Division

Question 1

Explain why becoming multicellular requires the development of specialised organ systems, limited to?

Answer 1

• communication between cells
• supplying cells with nutrients
• controlling exchanges with the environment

Question 2

Explain why, in meiosis, the chromosomes number is halved and each is genetically different, to include what?

Answer 2

• one chromosome from each pair separate to opposite poles of the cell in the first division.
• chromosomes divide and the copies move to opposite poles of the cell in the second division.

Question 3

Gametes have what?

Answer 3

Gametes have half the number of chromosomes of the body cells (haploid number)

Question 4

Chromosomes come in..?

Answer 4

Chromosomes come in matching pairs

Question 5

Whats differentiation??

Answer 5

Different cells do different jobs

Question 6

What’s meiosis?

Answer 6

Special type of cell division used to make sex cells (gametes)

Question 7

What’s mitosis?

Answer 7

Repairing damaged cells in the body. Also called copying division. Mitosis makes new cells for growth and repair. Mitosis is asexual reproduction

Question 8

Examples of mitosis

Answer 8

Bacteria & strawberries

Question 9

What’s diploid?

Answer 9

Double the amount of chromosomes

Question 10

What’s haploid?

Answer 10

Half the amount of chromosomes