This event randomly alters the genetic code of an organism and can lead to variation in a population.
What is mutation?
This must exist in a population’s genetic pool for natural selection to occur.
What is variation?
The extinction of these “terrible lizards” marked the end of the Mesozoic Era.
What are dinosaurs?
The side and top of the Punnett square is where these are written.
What are genotypes of parents?
These adaptations caused fish to dominate the ancient seas.
What are gills/eyes/teeth/scales?
Mammals are grouped together on a cladogram because of these features.
What are hair/mammary glands?
This process, where the alleles from parent generation are mixed randomly, can cause variation in a population.
What is sexual reproduction?
These features are inherited from parents and can aid an organism in natural selection.
What are traits?
The extinction of these roly-poly creatures marked the end of the Paleozoic Era
What are trilobites?
The boxes inside the Punnett square contain these.
What are genotypes of potential offspring?
These adaptations allowed tetrapods to cling to the floor of shallow bodies of water to conserve energy.
What are legs/fingers?
Chordates are animals with these structures which protect their nervous system.
What is a spinal cord?
A trait which allows an organism to be more successful in survival and reproduction.
What is an adaptation?
Beneficial inherited features must help an organism do these two things.
What are survive and reproduce?
These events are marked by the death of most types of organisms on Earth.
What are mass extinctions?
The probability of breeding a yellow pea plant.
What is 50%?
These respiratory adaptations allowed organisms to populate the land.
What are lungs?
Monkeys are not the ancestors of humans, but rather share this with us:
What is a common ancestor?
These different types of organisms are not usually able to breed offspring together.
What are species?
These two features of larkeys mattered most in their natural selection after the great fire.
What are leg length and fur color?
The current anthropomorphic extinction would be the __th extinction.
What is sixth?
The genotype for a brown-eyed child in this example.

What is Bb or heterozygous?
These adaptations allow birds to fly (name at least 2)
What are hollow bones/wings/feathers?
A tetrapod is defined as having:
What are 4 legs?
These rare organisms result when two different kinds of organisms (like horses and donkeys) are able to produce offspring.
What is a hybrid?
These two features of larkeys mattered least in their natural selection after the great fire.
What are eye color and tail shape?
This type of organism fills in the evolutionary gap between known organisms and can sometimes be found (like Tiktaalik).
What is a transitional organism?
The only possible genotype of a child with one homozygous dominant parent and one homozygous recessive parent.
What is heterozygous?
These adaptations allowed primates to be able to organize thoughts, create tools and societies. (name at least 2)
What are larger brains/opposable thumbs/empathy?
A circle on a cladogram indicates a past shared relative between humans and pine trees. These are features that relative would have had.
What are cells with nuclei?