SB2- Cells and Control

Question 1

What is cell differentiation

Answer 1

The process by which a cell changes to become specialised for it’s job. So that the organism can be more efficient

Question 2

What is cancer

Answer 2

Uncontrolled cell division=tumour. If the tumour invades the surrounding tissue then it’s called cancer.

All due to a mutation to the gene

Question 3

Explain how growth in animals occurs and changes throughout life

Answer 3

Cell division(mitosis) 
When young=rapid growth =lots of cell division 

When old most cell division is for repair.
This also means that cell differentiation is lost at an early stage

Question 4

What is mitosis( def not stages)

Answer 4

A form of cell division which happens during the cell cycle when the cell divides

Question 5

What is asexual reproduction

Answer 5

When organisms use mitosis to reproduce e.g. plants could form runners that become new plants

Question 6

What happens in interphase

Answer 6

DNA is spread out in long strings
Increase in subcellular organisms
Duplicates DNA (1 for each new cell)
DNA is copied and forms x chromo..