Intro to the Scientific Method & Evolution Flashcards
Science is limited to working on problems or answering questions involving things we can test by______________
Physical measurements
A scientist develops a ___________ based on their background knowledge of the subject. This is then tested by designing an _____________.
Hypothesis
Experiment
In the test, a variable/treatment is compared to the ________ to see if it had an effect.
Control group
A tested and generally accepted explanation of a biological principle is called a _______.
Theory
In science, __________ are generally tested and accepted descriptions of a principle.
Laws
Following the changes in frequency of traits in a population over time, is studying _________, which could lead to a new species.
Evolution
Natural selection without mutation, ________ the diversity of traits. (increases/decreases/doesn’t change)
Decreases
Darwin noticed that looking at traits among individuals in a population there was ___________.
Variation/Diversity
In a natural population, resources available usually are ________ at some time and the population’s fertile rate potentially _________ those resources.
Limited
Exceeds
This causes a competition to survive and reproduce, also known as ______.
Survival of the fittest
In evolutionary terms, “better fit” means that organism ___________ than another organism in the same population
Can produce more fertile offspring
Our food crops and dogs are examples of new varieties that have come about due to _________ selection.
Artificial
New traits come into a population by ________.
Mutations
Homologous traits are shared by species because they are _________.
Related by a common ancestor
An example of a homologous trait is ____________.
Bone structure of cats and whales
