Ecological Niches (HL IB Biology)

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11 mark

Euglena is an autotroph.

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Identify, from the diagram, the feature which indicates this is an autotrophic organism.

Nucleolus
Chloroplast
Contractile vacuole
Mitochondria

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1 mark

The Ghost Orchid (Epipogium aphyllum) is a rare plant species which lacks leaves or chlorophyll. The plant has formed a symbiotic relationship with a fungus in order to obtain the nutrition it requires. The growth of the fungus is slowed as a result of the relationship.

Which of the following rows correctly describes E.aphyllum?

	Heterotroph	Autotroph	Parasite	Saprotroph
A	✓	X	X	✓
B	X	✓	X	✓
C	✓	X	✓	✓
D	✓	X	✓	X

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