Evolution History

a trait that makes it more likely that an individual will survive in a specific environment

• adaptive trait

• body structure

• common ancestor population

• descendent species

Tags

NGSS.MS-LS4-4

the process by which species adapt to changes in the environment over a very long time

• evolution

• limb

• paleontologist

• shared structure

Tags

NGSS.MS-LS4-1

NGSS.MS-LS4-2

NGSS.MS-LS4-4

the process by which one population evolves into two or more different species

• species

• stability

• organisms

• speciation

Tags

NGSS.HS-LS4-1

NGSS.HS-LS4-2

NGSS.HS-LS4-4

This octopus and this surf clam both have a body structure called a mantle, which covers their soft bodies. However, the octopus’s mantle has muscles that help the octopus swim. The surf clam’s mantle helps the clam build its shell. Why are the mantles different?

• All species have their own specific body structures, so it is just a coincidence

• The octopus and surf clam are different species, so they do not share an ancestor population.

• It is impossible to explain the body structures of different species

• The octopus and surf clam both inherited the mantle structure from a shared ancestor population.

Tags

NGSS.MS-LS4-2

a body structure in two or more species that has the same parts (for example, the same bones).

• evolution

• limb

• paleontologist

• shared structure

Tags

NGSS.MS-LS4-2

a scientist who studies fossils in order to understand the ancient history of life on Earth.

• evolution

• limb

• paleontologist

• shared structure

Tags

NGSS.MS-LS4-1

any part of an organism (ex: like a bone or or organ)

• adaptive trait

• body structure

• common ancestor population

• descendent species

Tags

NGSS.MS-LS4-2

What is the process by which species adapt to environmental changes over a very long time ?

• evolution

• a common ancestor population

• speciation

• a generation

Tags

NGSS.MS-LS4-1

NGSS.MS-LS4-2

NGSS.MS-LS4-4

Both of these animals share a common trait, that they produce milk for their babies. What best explains why both have structures that create milk?

• The whale and the human are different species, so they must not share an ancestor population. They inherited their milk creating structure from separate ancestor populations.

• The whale and the human both share the same ancestor population that had milk producing structures. They inherited this structure from the ancestor population.

• It is impossible to say. Fossils are very old; therefore, we cannot make observations of the common ancestors, and we cannot explain its body structures.

• All species have their own specific body structures, so it is a coincidence that this human and whale each happen to have the ability to produce milk.

Tags

NGSS.MS-LS4-2

This human and this bat both have hand bones in their front limbs. However, their f bones are very different. The red bathas long finger bones that help it to fly. The human has short fingerr bones that help grab things. What most likely explains why both have front limbs with a hand bones and why the bones are different?

• different species, so they do not share an ancestor population. These species had separate ancestor populations, and each evolved hand bones that help it survive in its environment.

• It is impossible to explain the structures of different species. The way that structures change over time is very complex, and no one has ever observed these changes occurring.

• both inherited the bones from a shared ancestor population, but this population separated into different environments. In each environment, different types of handr bone evolved, which helped the populations survive.

Tags

NGSS.MS-LS4-2