The horizontal axis of the cladogram depicted below is a timeline that extends from 100,000 years ago to the present; the vertical axis represents nothing in particular. The labeled branch points on the tree (V-Z) represent various common ancestors. Let's say that only since 50,000 years ago has there been enough variation between the lineages depicted here to separate them into distinct species, and only the tips of the lineages on this tree represent distinct species.

 In Darwin's tree of life, each fork in the tree represents ________.

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#Question id: 4683

#Unit 3. Fundamental Processes

A very unstable protein in E. coli; it is degraded by a specific protease called FtsH (HflB), encoded by the hfl gene.

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#Question id: 15734

#Unit 12. Applied Biology

In seed germination or seed culture process growth regulators are usually not necessary because, of

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#Question id: 27555

#Unit 1. Molecules and their Interaction Relevant to Biology

Aspartate involved in

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#Question id: 11919

#Unit 10. Ecological Principles

Frequent disturbances could lead to failure of a community to reach a climax community as one seral stage keeps replacing itself, a condition known as

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#Question id: 15758

#Unit 12. Applied Biology

Adsorbants like activated charcoal or PVP (polyvinylpyrrolidon) may be used as adsorbant to prevent