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What type of evidence is represented in the picture above:
What type of evidence is shown in the image above?
What type of evidence are shown in the picture above?
Body parts similar in structure and origin
A category of structures that have a similar function, but are structurally different.
Common core structures
What type of structure does this image illustrate?
What are the most important characteristics of analogous structures?
Structures that perform the same function
Structurally the same
Structures that perform different functions
A type of structure that is physically present, but does not seem to serve a significant function for an organism.
The appendix, tailbone, and wisdom teeth are all examples of what type of structure in humans?
Observe the two fish in the image. The cave fish and minnow are genetically related to each other and are similar in many ways. The cave fish lives very deep in the ocean where there is no light. It has only the remnants of eyes and is blind. Minnows live in shallow waters where the water has light. Their eye sight is important for their survival. Which statement below best describes these two fish?
The DNA of the cave fish has changed over time to differ from the minnow. Since there is no light where the cave fish lives, it was not necessary to have working eyes. Over time, mutations occurred which proved to improve the survival of the cave fish, which is why they are now blind and have only physical remnants of eyes.
The DNA has not mutated over time and despite all of the evidence that suggests these two are genetically similar, one has eyes and the other does not so they must not be related.
Cave fish must have been attacked by predators, which is why they only have the remnants of eyes.
Does the presence of homologous structures in genetically different animals suggest common ancestry?
The fossil record help scientists
better understand the kinds of organisms that lived in the past
better understand how the environment has changed over time
better understand how organisms have evolved over time
all of the above
What is the value of a transitional fossil?
Transitional forms show the evolutionary steps between species.
Transitional forms are evidence of punctuated equilibrium.
Which of the following are homologous structures?
whale flipper and bat wing
legs on a beetle and legs on a cat