Most terrestrial ecosystems have a pyramidal structure of where biomass of producers > primary consumers > secondary consumers > tertiary consumers. However, some aquatic ecosystems have an inverted pyramidal structure where the standing biomass of producers < primary consumers. An explanation for this is:

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#Question id: 5799

#Unit 8. Inheritance Biology

Mutations that cause loss of a chromosome would be termed:

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#Question id: 7276

#Unit 5. Developmental Biology

The cells that make up a tetrapod limb arise from three developing tissues:

The ____a______ will provide skeletal precursors to the limb.

The _____b____ will provide muscle precursors to the limb.

The _____c____ will provide the skin of the limb.

Which of the following option is correct?

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#Question id: 3710

#Unit 3. Fundamental Processes

The protein machine that carries out DNA replication is called ________.

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#Question id: 10242

#Unit 10. Ecological Principles

Ecologist Robert Macarthur observed that five species of similar warblers coexisted on spruce trees because they

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#Question id: 33369

#Unit 1. Molecules and their Interaction Relevant to Biology

Max Perutz proposed that the T to R transition is triggered by