Vocabulary
Organisms that are better adapted to their environment tend to survive and produce more offspring. This is known as…
Natural Selection
The difference among traits of the same species of organisms is…
An organism of the same species with less favorable traits will be less likely to….
Survive
The British naturalist Charles Darwin developed a theory after observing species in the Galapagos Islands. What is the name of this theory?
Theory of Evolution
Evolution explains how Earth's present-day species developed from earlier species through
Natural Selection
A trait that helps organisms survive in its environment is called an…
A state of inactivity that helps an organism survive by conserving food is a trait known as…
Hibernation
The theory of natural selection is also known as change over…
Time
Galapagos finches are birds that live on islands off the coast of South America. The finches on the various islands are very different from each other. As a result of the different food resources on the islands, which of the following structures of the Galapagos finches experienced the greatest change through natural selection?
Beak shape
Genes are strands of ________ found on chromosomes in the nucleus of a living cell.
DNA
The intentional breeding of organisms to produce offspring with desired traits is known as...
Selective Breeding
The descendants, or children, that result from reproduction is known as…
Offspring
A well tested concept that explains a wide range of observations is a…
Scientific Theory
Over time, a certain species of hummingbird has developed traits including a small body, brightly colored feathers, a long, narrow beak, and the ability to drop its body temperature while it sleeps. Which of these characteristics is most likely a trait that developed in response to available food sources?
Long, narrow beak
A population of birds walks along the shores of a swampy area eating small crabs. Climatic changes cause the water level in the area to increase. Which genetic variation in the bird population will be at an advantage leading to greater survival in the area?
Longer legs for wading
A distinguishing quality or characteristic that is inherited is known as a…
Darwin observed that most species produce far more offspring than can survive. This is called…
Overproduction
Severe or sudden changes in Earth's atmosphere can cause entire species of animals to die. When all of the members of species die out, it is called
Extinction
Which island did Charles Darwin discover several species of finches that varied from island to island.
Galapagos Island
Which internal structure is an adaptation that provided organisms with the function to perform gas exchange on land?
Lungs
A movement of animals from one place to another according to the season is a behavior called…
Migration
A method used to identify a species of organisms is known as a…
Dichotomous Key
A random change in a cell's DNA is called a
Mutation
The structure of the Galapagos finch beaks is an adaptation to the type of _________ on each island.
Food
A species has a better chance of surviving if it has greater variation in its
Genes