| A | B |
|---|
| increase in size | growth |
| measurement used to measure growth | length |
| growth of human babies is monitored by | mass and length |
| A baby's mass is in the 95th percentile, this means | 5% of all babies will be heavier |
| A baby's mass is in the 50th percentile, this means that | 50% of all babies will be lighter |
| changes causing specialisation | differentiation |
| red blood cells | have no nucleus |
| haemoglobin | carries oxygen |
| fat cells can store fat droplets | for when the body needs energy |
| elongation | increase in length |
| meristem | found in plant shoot and root tips |
| root hair and xylem cells are | specialised plant cells |
| xylem tubes | carry water through a plant |
| xylem vessels have thick walls | to withstand water pressure |
| xylem vessels | are long tubes formed from dead xylem cells |
| function is photosynthesis | palisade cells |
| plant meristem cells | have many ribosomes |
| Root hair cells | increase surface area |
