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Question 23M.1.SL.TZ2.18

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Date May 2023 Marks available [Maximum mark: 1] Reference code 23M.1.SL.TZ2.18
Level SL Paper 1 Time zone TZ2
Command term Question number 18 Adapted from N/A
18.
[Maximum mark: 1]
23M.1.SL.TZ2.18

The diagram shows the digestive system of an earthworm (Lumbricus terrestris). It feeds by ingesting dead organic matter.

[Source: Kellogg, V.L. and McCracken, M.I., 1911. The Animals and Man: An Elementary Textbook of Zoology and
Human Physiology. New York: H. Holt and company [diagram online] Available at: https://commons.wikimedia.
org/wiki/File:The_animals_and_man;_an_elementary_textbook_of_zoology_and_human_physiology_(1911)_
(14598311027).jpg [Accessed 14 February 2022]. Public domain.]

 

What is the mode of nutrition of the earthworm?


A.  Heterotrophic detritivore

B.  Autotrophic decomposer

C.  Heterotrophic consumer

D.  Heterotrophic saprophyte

[1]

Markscheme

A