The process in which pioneer species colonize a bare substrate such as rock, sand, or glacial till is known as

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#Question id: 8863

#Unit 9. Diversity of Life Forms

Which class of the phylum Cnidaria includes ʺjelliesʺ with rounded (as opposed to boxlike) medusae? 

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#Question id: 2950

#Unit 2. Cellular Organization

During which phases of the cell cycle do the chromosomes exist in a doubled state?

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#Question id: 23472

#Unit 1. Molecules and their Interaction Relevant to Biology

Which of the following statement does describe best the computer based information system?

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#Question id: 26945

#Unit 10. Ecological Principles

If the net reproductive rate is less then 1 than it represents____

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#Question id: 4581

#Unit 11. Evolution and Behavior

The Linnaeus classification system grouped organisms by ________.