A
B
C
D
E
100
Imagine you are a scientist who wants to determine if two organisms are common ancestors of each other. Provide at least two ways you could examine the animals to gather evidence towards determining if they had a common ancestor?
Analyze their DNA sequences and compare their anatomical structures.
100
________________________ is the study of the structure of a plant or animal
Anatomy
100
What evidence do similarities between fossil bones and modern organisms provide?
homologous structures are evidence that the two species are related or shared a common ancestor
100
True or False?
Generations of a species that are closer together in relation, look ______________
more similar
100
A common ancestor is
A past relative (extinct species) shared by 2 or more living species today.
200
What do the Mouse and Perch have in common?
Jaws, Lungs, Claws
200
Which organism is more closely related to the Chimp?
lizard
200
Humans, birds, whales, and lizards all have similar arm bones. What is the reason for this?
They may have a common ancestor.
200
What type of structure?
Homologous
200
Compare the following structures? What is different about the limbs?
Their functions are not all the same
300
Bird wings and butterfly wings are an example of
Analogous structure
300
Evolved from the same ancestor, but have different functions
Homologous structures
300
What do analogous structures suggest?
Organisms independently evolved similar solutions to adapt to environmental challenges
300
Evolved from different ancestors, but due to living in similar environments have a similar function.
Analogous structures
300
An anatomical feature that no longer seems to have a purpose in the current form of an organism
Vestigial structure
400
Select all of the vestigial structures
Human tailbone
Whale hind leg bones
Snake leg bones
400
Ostrich wings are examples of
Vestigial structure
400
The study of organisms at their earliest stage of life
embryology
400
According to this cladogram, crocodiles are LEAST related to:
Sharks
400
According to this cladogram, which trait/traits do amphibians have that separate them from Sharks
Bony Skeleton
Four Limbs
500
Which of the following animals have an amniotic egg?
Birds
Crocodiles
Primates
Rabbits
500
Which of the following animals have hair?
Primates
Rabbits
500
Which of the following animals have egg with shells?
Birds
Crocodiles
500
Which of the following animals have vertebrae?
Birds
Crocodiles
Primates
Rabbits
Amphibians
Ray-finned fish
Sharks
500
Select the animal that is most closely related to the crocodiles?
Birds