UNIT 6 Plant Science
Unit Outline
IB Roadmap: B3, D3
Form & Function (B)
Adaptations are forms that correspond to function. These adaptations persist from generation to generation because they increase the chances of survival.
Continuity and Change (D)
Living things have mechanisms for maintaining equilibrium and for bringing about transformation. Environmental change is a driver of evolution by natural selection.
Syllabus Statements
B3.1.7 Adaptations for gas exchange in leaves
B3.1.8 Distribution of tissues in a leaf
B3.1.9 Transpiration as a consequence of gas exchange in a leaf
B3.1.10 Stomatal density
B3.2.7 Transport of water from roots to leaves during transpiration
B3.2.8 Adaptations of xylem vessels for transport of water
B3.2.9 Distribution of tissues in a transverse section of the stem of a dicotyledonous plant
B3.2.10 Distribution of tissues in a transverse section of the root of a dicotyledonous plant
B3.2.17 AHL Generation of root pressure in xylem vessels by active transport of mineral ions
B3.2.18 AHL Adaptations of phloem sieve tubes and companion cells for translocation of sap
D3.1.8 Sexual reproduction in flowering plants
D3.1.9 Features of an insect-pollinated flower
D3.1.10 Methods of promoting cross-pollination
D3.1.11 Self-incompatibility mechanisms to increase genetic variation within a species
D3.1.12 Dispersal and germination of seeds
