Topic: Reproduction in angiospermophytes
Draw and label a diagram showing the structure of a dicotyledonous animal-pollinated flower
Distinguish between pollination, fertilization, and seed dispersal
Draw and label a diagram showing the external and internal structure of a named dicotyledonous seed
Explain the conditions needed for the germination of a typical seed
Outline the metabolic processes during germination of a starchy seed
Explain how flowering is controlled in long-day and short-day plants, including the role of phytochrome
Topic: Transport in angiospermophytes
Outline how the root systems provide a large surface area for mineral ion and water uptake by means of branching and root hairs
List ways in which mineral ions in the soil move to the roots
Explain the process of mineral ion absorption from the soil into roots by active transport
State that terrestrial plants support themselves by means of thickened cellulose, cell turgor, and lignified xylem
Define transpiration
Explain how water is carried by the transpiration stream, including the structure of xylem vessels, transpiration pull, cohesion, adhesion, and evaporation
State that guard cells can regulate transpiration by opening and closing stomata
State that the plant hormone abscisic acid causes the closing of stomata
Explain how abiotic factors light, temperature, wind, and humidity affect the rate of transpiration in a typical terrestrial plant
Outline four adaptations of xerophytes that help to reduce transpiration
Outline the role of phloem in active translocation of sugars (sucrose) and amino acids from source (photosynthetic tissue and storage organs) to sink (fruits, seeds, and roots)
Topic: Plant structure and growth
Draw and label plan diagrams to show the distribution of tissues in the stem and leaf of a dicotyledonous plant
Outline three differences between the structures of dicotyledonous and monocotyledonous plants
Explain the relationship between the distribution of tissues in the leaf and the functions of these tissues
Identify modifications of roots, stems, and leaves for different functions: bulbs, stem tubers, storage roots, and tendrils
State that dicotyledonous plants have apical and lateral meristems
Compare growth due to apical and lateral meristems in dicotyledonous plants
Explain the role of auxin in phototropism as an example of the control of plant growth
Topic: Plant science
IB HL Biology syllabus is the Plant science. IBO recommends spending 11 hours on this topic.
This topic has 3 sub-chapters: "Plant structure and growth", "Transport in angiospermophytes" and "Reproduction in angiospermophytes". Each is separated with numerical values in order of mention.
These are all HL syllabus statements, it is recommended to bring a Casio Graphical Calculator instead of Texas.
Topic: Classification
Outline the binomial system of nomenclature
List seven levels in the hierarchy of taxa - kingdom, phylum, class, order, family, genus, and species - using an example from two different kingdoms for each level
Distinguish between the following phyla of plants, using simple external recognition features: Bryophyta, filicinophyta, Coniferophyta, and angiosperm phyla
Distinguish between the following phyla of animals, using simple external recognition features: Porifera, cnidaria, Platyhelminthes, Annelida, Mollusca, and Arthropoda
Apply and design a key for a group of up to eight organisms
Topic: Evolution
Define evolution
Outline the evidence for evolution provided by the fossil record, selective breeding of domesticated animals, and homologous structures
State that populations tend to produce more offspring than the environment can support
Explain that the consequence of potential overpopulation of offspring is a struggle for survival
State that the members of a species show variation
Explain how sexual reproduction promotes variation in a species
Explain how natural selection leads to evolution
Explain two examples of evolution in response to environmental changes; one must be antibiotic resistance in bacteria
Topic: Populations
Outline how population size is affected by natality, immigration, mortality, and emigration
Draw and label a graph showing a sigmoid (S-shaped) population growth curve
Explain the reasons for the exponential growth phase, the plateau phase, and the transitional phase between these two phases
List three factors that set limits to population increase
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