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Question 19N.1.HL.TZ0.39

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Date November 2019 Marks available [Maximum mark: 1] Reference code 19N.1.HL.TZ0.39
Level HL Paper 1 Time zone TZ0
Command term Deduce Question number 39 Adapted from N/A
39.
[Maximum mark: 1]
19N.1.HL.TZ0.39

Damselflies are flying insects. They lay eggs that hatch into larval forms that are aquatic. Adults excrete uric acid while the larval forms excrete ammonia. What is a possible explanation of this?

A. Uric acid can be excreted in a more concentrated form than ammonia.

B. Ammonia is less toxic than uric acid.

C. Uric acid requires more water for excretion than ammonia.

D. Only adult forms can produce uric acid.

[1]

Markscheme

A

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