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Descent with Modification

Across
The era that started with formation of the earth
The more ___ an organism, the more its genes are represented in the next generation
These have the same meaning in all living things
The arm and hand of a human is homologous to the wing of a __________
A population adapts to is ______________ over many generations
A period of rapid diversification that occurred about 530 million years ago
Sterile hybrid of a horse and a donkey
An ancestor to modern mammals that lived about 200 million years ago
Crop plants, pets and farm animals are a result of this type of selection
A group of mammals that includes humans
A pattern of evolution that leads to more than one species
Chicken and human _______ show some similar structures
A group of mammals that diversified on the continent of Australia
Down
The arm and hand of a human is homologous to the flipper of a ________
Fossilized tree sap
The accumulation of traits favorable to survival in a particular environment in a population.
A source of genetic variation due to exchange of chromosome fragments during meiosis
Darwin noticed that different species of these birds had different types of beaks
These prokaryotes are found in extreme habitats
These provide a record of organisms that lived on earth in millions of years ago
Evolution occurs at this level of biological organization
The branch point on a phylogenetic tree represents a common ___________
These do not evolve, but may be acted on by selection pressure
The current era
This effect is due to a change in the gene pool due to a reduction in population size
This group diversified after the dinosaurs went extinct
A single landmass that contained all the continents know today
Natural selection acts on ________ traits
These organisms are adapted to very salty environments
Dinosaurs were alive during this era
A segment of DNA that codes for a protein
This group of animals is included with the reptiles