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Ancestry

Across
The state of no longer existing
A multicelluar organism that undergoes extensive growth and development after the fertilization stage.
The process where organisms best suit to the environment are more likely to survive
Organisms sharing common decent
How organisms have evolved over time
The basic physical unit of heredity
All organisms in one area
A line of decent
Down
The process by which humans take control of the breeding process to choose the favorable traits to be passed on
The study of animal structures
A group of organisms of common descent that are in the same stage of development
Rock formed in layers form deposition and solidification
A feature of an organism
A diagram that illustrates evolutionary relationships
A genetic characteristic that allows an organism to survive and reproduce
Remains of an organism that lived in the past