-SQA- SCOTTISH QUALIFICATIONS AUTHORITY HIGHER NATIONAL UNIT SPECIFICATION GENERAL INFORMATION

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1 -SQA- SCOTTISH QUALIFICATIONS AUTHORITY HIGHER NATIONAL UNIT SPECIFICATION GENERAL INFORMATION -Unit Number Superclass -Title- RH PLANT DIVERSITY DESCRIPTION- GENERAL COMPETENCE FOR UNIT: Explaining the change in the morphology and anatomy of plants as they evolve and adapt to their environment. Explaining the increased complexity in the life cycle of different plants. OUTCOMES 1. explain the external morphology and internal anatomy of plants as they evolve and adapt to their terrestrial environment; 2. explain the increasing complexity in life cycles in different plant types using the alternation of generations model. CREDIT VALUE: 1 HN Credit ACCESS STATEMENT: Standard Grade at 3 in Biology, or equivalent For further information contact: Committee and Administration Unit, SQA, Hanover House, 24 Douglas Street, Glasgow G2 7NQ. Additional copies of this unit may be purchased from SQA (Sales and Despatch section). At the time of publication, the cost is 1.50 (minimum order 5).

2 HIGHER NATIONAL UNIT SPECIFICATION STATEMENT OF STANDARDS UNIT NUMBER: UNIT TITLE: PLANT DIVERSITY Acceptable performance in this unit will be the satisfactory achievement of the standards set out in this part of the specification. All sections of the statement of standards are mandatory and cannot be altered without reference to SQA. OUTCOME 1. EXPLAIN THE EXTERNAL MORPHOLOGY AND INTERNAL ANATOMY OF PLANTS AS THEY EVOLVE AND ADAPT TO THEIR TERRESTRIAL ENVIRONMENT PERFORMANCE CRITERIA (a) (b) (c) The description of the anatomy of vegetative parts is correct in terms of morphology and function. The description of reproductive organs is correct in terms of morphology and function. The explanation of the adaptations of plants to life in the terrestrial environment is correct in terms of evolutionary change. RANGE STATEMENT Plant types: a moss; a liverwort; a fern; a club moss; a gymnosperm; an angiosperm. Reproductive structures: archegonium; antheridium; sporangium; sporophyll; strobilus; flower. Adaptions to life on land: obtaining enough water; support of aerial parts; gas exchange; internal transport; reproduction independent of wet conditions. EVIDENCE REQUIREMENTS Written evidence giving a brief description of the morphology and function of the external and internal anatomy of vegetative parts and reproductive organs. Written evidence giving a brief explanation of plants evolutionary adaptations to the terrestrial environment. 2

3 OUTCOME 2. EXPLAIN THE INCREASING COMPLEXITY IN LIFE CYCLES IN DIFFERENT PLANT TYPES USING THE ALTERNATION OF GENERATIONS MODEL PERFORMANCE CRITERIA (a) The description of the alternation of generations is correct in terms of ploidy. (b) The explanation of the significance of homospory and (c) heterospory is correct. The explanation of the significance of single and double fertilisation in spermatophytes is correct. (d) The explanation of the significance of flagellate and non-flagellate male gametes is correct in terms of evolutionary adaptations. RANGE STATEMENT Plant types: a moss; a livewort; a fern; a club moss; a gymnosperm; an angiosperm. EVIDENCE REQUIREMENTS Written evidence explaining the increasing complexity in life cycles in different plant types using alternation of generations as a model. MERIT To gain a pass in this unit, a candidate must meet the standards set out in the outcomes, performance criteria, range statements and evidence requirements. To achieve a merit in this unit a candidate must demonstrate a superior or more sophisticated level of performance. This would be demonstrated by two of the following: - an in-depth explanation of the evolutionary adaptations of plants to life on earth; - an in-depth explanation of the significance of homospory and heterospory and of single and double fertilisation in spermatophytes; - an in-depth explanation of the significance of flagellate and non-flagellate male gametes

4 ASSESSMENT In order to achieve this unit, candidates are required to present sufficient evidence that they have met all the performance criteria for each outcome within the range specified. Details of these requirements are given for each outcome. The assessment instruments used should follow the general guidance offered by the SQA assessment model and an integrative approach to assessment is encouraged. (See references at the end of support notes.) Accurate records should be made of the assessment instruments used showing how evidence is generated for each outcome and giving marking schemes and/or checklists, etc. Records of candidates' achievements should also be kept. These records will be required for external verification. SPECIAL NEEDS Proposals to modify outcomes, range statements or agreed assessment arrangements should be discussed in the first place with the external verifier. Copyright SQA 1996 Please note that this publication may be reproduced in whole or in part for educational purposes provided that: (i) (ii) no profit is derived from the reproduction; if reproduced in part, the source is acknowledged. 4

5 HIGHER NATIONAL UNIT SPECIFICATION SUPPORT NOTES UNIT NUMBER: UNIT TITLE: PLANT DIVERSITY SUPPORT NOTES: This part of the unit specification is offered as guidance. None of the sections of the support notes is mandatory. NOTIONAL DESIGN LENGTH: SQA allocates a notional design length to a unit on the basis of the time estimated for achievement of the stated standards by a candidate whose starting point is as described in the access statement. The notional design length for this unit is 40 hours. The use of notional design length for programme design and timetabling is advisory only. PURPOSE This unit would most likely be used early on in HNC and HND programmes in Biology or other Science awards. It is designed to provide a base on which further units may build. CONTENT/CONTEXT Examples of the plant types, mentioned in the range statement for Outcomes 1 and 2, which might be used are: a moss a liverwort a fern a club moss a gymnosperm an angiosperm - Funaria - Marchantia - Dryopteris - Lycopodium or Selaginella - Pinus sylvestris - Ranunculus REFERENCES 1. Guide to unit writing. 2. For a fuller discussion on assessment issues, please refer to SQA's Guide to Assessment. 3. Information for centres on SQA's operating procedures is contained in SQA's Guide to Procedures. 4. For details of other SQA publications, please consult SQA's publications list. 5

6 Copyright SQA 1996 Please note that this publication may be reproduced in whole or in part for educational purposes provided that: (i) (ii) no profit is derived from the reproduction; if reproduced in part, the source is acknowledged. 6