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Date November 2017 Marks available 1 Reference code 17N.2.SL.TZ0.04
Level Standard level Paper Paper 2 Time zone TZ0 / no time zone
Command term State Question number 04 Adapted from N/A

Question

The diagram shows a leaf from Dryopteris arguta.

[https://commons.wikimedia.org/wiki/File:E20161208-0001%E2%80%94Dryopteris_arguta_(Reverse)%E2%80%94RPBG_(30698925004).jpg, E20161208-0001—Dryopteris arguta (Reverse)—RPBG Source: https://www.flickr.com/photos/john_d_rusk/30698925004/ Author: John Rusk from Berkeley, CA, United States of America, licensed under Creative Commons licence: https://creativecommons.org/licenses/by/4.0/legalcode]

 

State the phylum of this plant.

[1]
a.i.

State two characteristics of plants from the phylum you stated in (a)(i).

 

 

[2]
a.ii.

Outline why the number of trophic levels is limited in a food chain.

[1]
b.

Markscheme

Filicinophyta/Filicinophytes/Pteridophytes

Reject “ferns”

a.i.

a. have roots, stem and leaves

All three, roots, stem and leaves required

b. pinnate leaves/leaves divided «repeatedly» into leaflets

c. have vascular tissue/xylem and phloem

d. produce spores/sporangia

    OR

    no flowers/fruits/seeds

[Max 2 Marks]

a.ii.

energy losses between trophic levels

OR

only part of the energy in one trophic level will become part of the next trophic level

b.

Examiners report

[N/A]
a.i.
[N/A]
a.ii.
[N/A]
b.

Syllabus sections

Core » Topic 5: Evolution and biodiversity » 5.3 Classification of biodiversity
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Core » Topic 5: Evolution and biodiversity
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