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Bonkers For Bio

Across
The influence of closely associated species on each other in their evolution
The branch of science concerned with classification
Gradual development of a species
The remains of a prehistoric organism
Process where by organisms better adapted to their environment tend to survive
Policy of gradual reform
The formation of a new species
Variation in the relative frequency of different genotypes in a small population
Down
A fossil that is useful for dating and correlating the strata in which it is found
Any difference between organisms
A branching diagram showing the cladistic relationship between number species
The process of a species becoming extinct
Theory that many of earths crustal features formed as a result of past cataclysmic activity
Process of adapting
A group of living organisms that reproduce