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Question 20N.1.HL.TZ0.16

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Date November 2020 Marks available [Maximum mark: 1] Reference code 20N.1.HL.TZ0.16
Level HL Paper 1 Time zone TZ0
Command term Question number 16 Adapted from N/A
16.
[Maximum mark: 1]
20N.1.HL.TZ0.16

Plankton are major producers in marine ecosystems. Only a small proportion of the energy harvested by plankton is passed to the primary consumers. Which process in phytoplankton results in the largest loss of energy that could otherwise be utilized by consumers?

A. Reproduction

B. Homeostasis

C. Excretion

D. Respiration

[1]

Markscheme

D

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