B2 - cell division

Question 1

What is differentiation

Answer 1

When cells change depending on their environment

Question 2

What are unspecialised cells called

Answer 2

Stem cells

Question 3

Why can’t animal cells redifferentiate

Answer 3

The genes are switched off so when it divides by mitosis they are switched off in the daughter cells as well

Question 4

What are the two types of plant meristem

Answer 4

Apical meristems allow the plant to grow at roots and shoots and redifferentiate, lateral meristems cause secondary growth at the stem. This allows you to take cuttings.

Question 5

Where can stem cells be found

Answer 5

Bone marrow, embryos

Question 6

How does mitosis work

Answer 6

First, everything but chromosomes are duplicated, then chromosomes are duplicated and lined up in the middle of the nucleus, then the chromosomes split and move to the poles of the nucleus, then the nucleus splits, then the cell membrane splits and there are two identical daughter cells.