Old and new species 0.0 / 5 ? BiologyVariety of life and classificationGCSEAQA Created by: charlie_rose15Created on: 25-11-13 19:28 342516 Across 1. We don't know when life began because there is little trustworthy ? (8) 4. in an isolated population, ........... that increases the chances of survival are selected (7) 6. what are the remains of organisms from long ago, found in rocks (7) Down 2. many species have evolved and become ? (7) 3. new species arise when two populations become ? (8) 5. what occurs when the populations become so different they cant interbreed (10)
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