These are thought to have brought water to earth's surface
What are comets or meteorites
The likelihood an organism is to survive and reproduce in their environment
What is biological fitness
Sexual selection leads to differences in phenotype between males and females. This phenomenon is known as:
What is sexual dimorphism
The different types of life on Earth
What is biodiversity
These were the 1st organisms responsible for changing the atmosphere of Earth because they use photosynthesis to make glucose and oxygen.
What are cyanobacteria
In the image this litter of kittens all have different phenotypes. Which of the FOUR factors does this image show?
What is variation due to mutation and sexual reproduction
The image below shows the skulls of different species of waterfowl... This type of adaptation is shown by the differences in the beaks and the skulls of these birds?
What is anatomical adaptations
Resources that can be recycled and used over and over again
What are renewable resources
3 types of evidence Darwin had access to and used as evidence for "Descent With Modification"
What are fossils, comparative anatomy and biogeography
Human birthweight favors individuals that express the intermediate phenotype. This is an excellent example of...

What is stabilizing selection
Favors one or the other of a phenotypic extreme
What is directional selection
The idea that mates are chosen based on the traits exhibited and those traits give the offspring a better chance for survival.
What is the good gene hypothesis
What are the Galapagos Islands
Look at this image. This is an example of...

Select which of the FOUR factors this image best represents

Type of selection that favors one extreme phenotype or the other
What is directional selection
Similarities between amino acid sequences found in different species would be an example of this type of evidence for evolution
What is molecular evidence or protein comparisons
Evolution occurring on its smallest scale. A change in allele frequency over generations
What is microevolution
A version of a trait
What is an allele
Type of selection driven by the hand of humans
What is artificial selection
This technology for dating rocks of the Earth was developed in the early 1900s and uses radioactive isotopes to determine the exact age of rocks.
The mechanism for evolution seen here:
Founders Effect (Genetic Drift)
The type of adaptation seen in the image below:
Heart rate and oxygen consumption during hibernation

What is physiological
Migration would be this type of adaptation seen in animals
What is behavioral