The Community of Heterotrophic Protists and Invertebrate Animals, Such as Earthworms

question 122

Multiple Choice

The community of heterotrophic protists and invertebrate animals, such as earthworms, pillbugs, mites, and pseudoscorpions, that live in the leaf litter on the shady floor of a deciduous forest obtains its energy and nutrients primarily from:

• A)carbohydrates formed in the roots of the trees that leach out into the surrounding soil.
• B)chemosynthesis by green and purple sulfur bacteria living on the surface of the leaves.
• C)decomposition of the leaves of deciduous trees that fall on the surface of the soil.
• D)photosynthesis or algae living in the soil beneath the leaves.
• E)predation on one another.

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Definitions:

Flagella

Long, slender projections from a cell that are used for locomotion or sensory functions.

Filum

A slender thread-like structure, especially one found in the anatomy of animals, such as the filum terminale in the human spine.

Fillet

A piece of meat or fish that has been stripped from the bone, often prepared for cooking.

Embryo

An early stage in the development of organisms, in humans this covers the first eight weeks following fertilization.