EMBROLOGY
This is evolutionary concept explains why vertebrate embryos look so similar.
What is Common ancestry?
When some organisms share a common ancestor, they have features with different functions, and similar structures.
What is a homologous structure?
These organs or structures are reduced by evolution and a smaller reminant of a once larger organ or body part.
What are vestigial structures?
Cladograms are constructed by grouping organisms together based on their _____ characteristics.
What is shared?
The change in the characteristics of a species over several generations and relies on the process of natural selection
What is evolution?
this stricture is shared by all vertebrates and are always present at some point.
What are fills or gill slits?
Are bird and butterfly wings both examples of this structure
What is an Analogous structure?
This vestigial structure is common in humans and often removed from the lower and upper jaw around ages 17-20.
What are wisdom teeth?
Sharks are most closely related to this organism depicted in graph one.
What are Ray Finned Fish?
the natural arrangement and apportionment of the various forms of animals and plants in the different regions and localities of the earth.
What is geographical distribution?
an unborn or unhatched offspring in the process of development
What is an Embryo?
This structure is depicted as different types of bone structures together, illustrated as a hand, or leg.
What is a homologous structure?
The structure found in whales that indicates that they once had the ability to walk
What is a whale pelvis?
This trait is uniquely found in humans and ancestral relatives(Graph 2)
what are thumbs?
Comparative anatomy was used by early evolutionary scientists to establish links between species. They claimed that organisms with similar structures must have inherited these characteristics from a common ancestor.
What is comparative autonomy in evolution?
around 2-8 weeks
How long does it take a human offspring to get to fertilization?
If both organisms have similarities developed by common life experiences and not by ancestry, a _______ structure would best describe them.
What is the analogous structure?
This vestigial structure found in our lower back is no longer used as it’s original purpose perhaps, its secondary usage that allows us to sit/stand easier as it connects to our muscles and helps lift heavier weights
What is the human tail bone?
species of organisms that have hair
What are primates and rodents?
An example of evidence of evolution that is the remains or imprints of organisms from earlier geological periods preserved in sedimentary rock.
What are fossil records?
These ancient genes are expressed during a middle "phylotypic stage" of embryonic development for all species.
What’s the name of the stage during the ancient genes of embryonic development?
The limbs of humans, cats, whales, and bats are an example of this type of structure.
What is the homologous structure.
These ____ are a part of the body’s immune system because of their location. The development of the structure found in our throats are developed in early life.
What are tonsils?
all of the organisms shown in the cladogram have or come from TWO common ancestors because the branch shows the appliance for all of them meaning it involves all of the organisms into similar ancestry.
What organisms have similar bilaterally ancestry? (graph 2)
The building blocks that make up the order of a DNA molecule.
What are DNA sequences?