Charles Darwin was one of these - a person who observes and studies the natural world.
What is a naturalist?
100
Occurs when a species is not able to adapt to a changing environment.
What is extinction?
200
Provides clues about how and when a new species evolved and how organisms are related.
What is the fossil record?
200
Darwin traveled to these islands off the coast of South America.
What are the Galapagos Islands?
200
When a species is about to become extinct.
What is an endangered species?
300
A shared structure that is inherited from a common ancestor.
What is a homologous structure?
300
Darwin discovered ________ on the Galapagos had adapted by eating seaweed, and had broad claws for balancing on slippery rocks.
What are iguanas?
300
Factors that affect biodiversity in an eco system include area, climate, genetic diversity, and _________ of _________.
What is diversity of niches?
400
Scientists can infer relationships between organisms from this stage of life of an animal.
What is early development?
400
Darwin discovered that if a species needs to find more food and is competing they will adapt to eat a new food. Which species on the Galapagos did this?
Finches.
400
A new species can form when individuals are ____________ from the rest of the species.
What is isolated?
500
Scientists use _______ _______ in proteins to find how closely two species are related.
What are amino acids?
500
Darwin proposed that over a long period of time, natural selection causes change. Helpful variations will accumulate in a species, while _________ ______ will disappear.
What are unfavorable traits?
500
This number of species are identified that live on Earth.