DP Biology (first assessment 2025)

Question 22N.1A.HL.TZ0.34

Date	November 2022	Marks available	[Maximum mark: 1]	Reference code	22N.1A.HL.TZ0.34
Level	HL	Paper	1A	Time zone	TZ0
Command term		Question number	34	Adapted from	N/A

34.

[Maximum mark: 1]

22N.1A.HL.TZ0.34

A hummingbird is shown visiting a large flower.

[Source: Nussbaumer, R./Naturepl.com, n.d. Black chinned hummingbird (Archilochus alexandri). Available at:
https://www.naturepl.com/stock-photo/black-chinned-hummingbird-archilochus-alexandri-male-feeding-at-sageflower/search/detail-0_01140572.html.]

What makes this a mutualistic relationship?

A. The bird feeds on nectar and transfers pollen to the stamen of a flower of the same species.

B. The bird obtains nutrients and the plant is assisted with pollination for sexual reproduction.

C. The bird requires pollen as a protein source and, while obtaining this, disperses seeds for the plant.

D. The bird transfers pollen to the stigma of flowers of a different species while feeding.

[1]

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Syllabus sections

C. Interaction and interdependence

C. Interaction and interdependence » C4.1. Populations and communities » C4.1.11. Herbivory, predation, interspecific competition, mutualism, parasitism and pathogenicity as categories of interspecific relationship within communities

C. Interaction and interdependence » C4.1. Populations and communities » C4.1.12. Mutualism as an interspecific relationship that benefits both species

C. Interaction and interdependence » C4.1. Populations and communities

Question 22N.1A.HL.TZ0.34

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