DP Biology (first assessment 2025)

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Question 23M.2.HL.TZ1.a

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Date May 2023 Marks available [Maximum mark: 7] Reference code 23M.2.HL.TZ1.a
Level HL Paper 2 Time zone TZ1
Command term Describe Question number a Adapted from N/A
a.
[Maximum mark: 7]
23M.2.HL.TZ1.a

Describe how plants are named and classified, including recognition features of plant phyla.

[7]

Markscheme
  1. binomial naming
    OR
    genus and species name;
  2. plants constitute a kingdom
  3. plants are eukaryotes/belong to the domain eukaryota
  4. classified using a hierarchy of taxa
    OR
    kingdom, phylum, class, order, family, genus, species
  5. bryophyta/filicinophyta/coniferophyte/angiospermophyta is a phylum (of plants);
  6. bryophytes have only rhizoids/spores (produced in a capsule)/no roots/ no vascular tissue;
  7. filicinophytes have stems/roots/xylem-phloem/reproduce by spores/leaves that uncurl; but no seeds
  8. coniferophytes have seeds in cones/ vascular tissue/xylem-phloem/cambium/ but no flowers/no fruits
  9. angiospermophytes have flowers/produce seeds/produce fruits/vascular tissue/xylem-phloem;
  10. named example showing of the classification of a plant from species to domain or vice versa
  11. cladistics is used to reclassify groups of plants
    OR
    named example of a group of plants reclassified by cladistics;
  12. use a dichotomous key to discriminate among plant features

 

Each phylum of plants requires at least 2 features for the mark.

Mp-e does not require all 4 phyla to be named.

Syllabus sections