How Does Evolution Change Over Time
Evolution is change over a long period of time. An organism's characteristics change over time due to its DNA. The DNA determines how an organism looks. The process of evolution is over millions of years. Scientists use fossils, embryology, comparative anatomy, and the biochemistry to get data fro the organisms of their evolutionary histories. For this purpose for doing this lab is to related organisms’ skull evolved or change over time.
Fossils are past living remain organism that left behind and this help to define what organism are they and estimates the age of the fossils. Homologous structures are similar in structure but have different function. One example is a human arm and a bird’s wing, they both do the same thing but they function differently. Analogous structure are part of the body that have similar function and they don't have similar structure or indicate shared ancestry. Vestigial structure are part of the body that don't play a major role to the organism. Scientists use these to prove that evolution exist and they can compare …show more content…
Variables The dependent variables is the prognathism, bipedalism, and the cranial capacity. The independent variable is the type of skull.
Materials
Skulls
Ruler
Protractor
Caliper
Procedures
Use the ruler to measure the distance of opisthocranion opisthotonos in cm
Use the ruler to measure the distance of opisthocranion oracle in cm
Divide opisthocranion opisthotonos by opisthocranion oracle and multiply it by 100 to get the opisthion index.
To measure the maxillary angle, lay the skull parallel to the table and use the protractor to measure the angle of the skull jaw
Measure the height, width, and length of the skull by using the caliper to in cm
To find the cranial capacity, multiplying the length, width, and height
Copy data down
Table Bipedalism Prognathism Cranial
Fossils are past living remain organism that left behind and this help to define what organism are they and estimates the age of the fossils. Homologous structures are similar in structure but have different function. One example is a human arm and a bird’s wing, they both do the same thing but they function differently. Analogous structure are part of the body that have similar function and they don't have similar structure or indicate shared ancestry. Vestigial structure are part of the body that don't play a major role to the organism. Scientists use these to prove that evolution exist and they can compare …show more content…
Variables The dependent variables is the prognathism, bipedalism, and the cranial capacity. The independent variable is the type of skull.
Materials
Skulls
Ruler
Protractor
Caliper
Procedures
Use the ruler to measure the distance of opisthocranion opisthotonos in cm
Use the ruler to measure the distance of opisthocranion oracle in cm
Divide opisthocranion opisthotonos by opisthocranion oracle and multiply it by 100 to get the opisthion index.
To measure the maxillary angle, lay the skull parallel to the table and use the protractor to measure the angle of the skull jaw
Measure the height, width, and length of the skull by using the caliper to in cm
To find the cranial capacity, multiplying the length, width, and height
Copy data down
Table Bipedalism Prognathism Cranial