GCSE Biology OCR B J257

B4.3: How do organisms grow and develop?

#B4.3.1

a) describe the role of the cell cycle in growth, including interphase and mitosis

b) describe how to use a light microscope to observe stages of mitosis *PAG1

Learners are not expected to recall intermediate phases*

#B4.3.2

describe cancer as the result of changes in cells that lead to uncontrolled growth and division

#B4.3.3

explain the role of meiotic cell division in halving the chromosome number to form gametes, including the stages of interphase and two meiotic divisions

Learners are not expected to recall intermediate phases

#B4.3.4

describe the function of stem cells in embryonic and adult animals and meristems in plants

#B4.3.5

explain the importance of cell differentiation, in which cells become specialised by switching genes off and on to form tissues with particular functions

B4.2
How do we know about mitochondria and other cell structures?
B4.4
How is plant growth controlled?