Evolution/Ecology

A grizzly bear survives because he is well-adapted to his environment. When he reproduces he passes on those traits to his offspring. This process is called

• Natural Selection

• Selective Breeding

• Random mutations

• Variations in a species

Tags

NGSS.MS-LS4-4

NGSS.MS-LS1-4

Behavioral changes of individuals of a species that allow for better survival. (Acquired traits)

• Variation
• Adaptation
• Behavior
• Environment

Where do adaptations come from?

• The individual organism decides to adapt

• Mutations that give an organism an advantage in its environment

• Genetic recombination during meiosis

• Both mutations and genetic recombination are sources of adaptation

Tags

NGSS.MS-LS4-4

NGSS.MS-LS3-1

What is the definition of fitness?

• ability to survive and reproduce in a specific environment
• organisms with traits well suited to their environment survive and reproduce at a greater rate
• a growing population causes a scarcity of resources
• differences in the DNA sequence

Tags

NGSS.MS-LS4-4

The differences among a species, like different bird beaks, are called

• genes.
• variations.
• traits.
• theories.

Tags

NGSS.MS-LS4-2

NGSS.MS-LS4-4

The arm of a human, the flipper of a whale, and the wing of a bat all have similar bone structures. Therefore, these parts of the body would all be considered...

• homologous structures

• vestigial structures

• transitional fossils

• common ancestors

Tags

NGSS.MS-LS4-2

The tail bone, wisdom teeth, and appendix are all parts of the human anatomy that would be considered...

• homologous structures

• vestigial structures

• fossils

• extinct

Tags

NGSS.MS-LS4-2

A bird's wing and a butterfly's wing have the same function, but they have very different structures. These structures are classified as follows:

• homologous structures

• analogous structures

• vestigial structures

• embryological homologues

Tags

NGSS.MS-LS4-2

Two organisms that are closely related would have

• very similar DNA sequence

• exactly the same DNA sequences

• no proteins in common

• completely different DNA sequence

Tags

NGSS.HS-LS3-1

The fossil record helps to build a timeline of life on Earth because...

• the older a fossil is, the deeper it will be found within layers of sedimentary rock.

• the older a fossil is, the closer it will be to the surface layers of sedimentary rock.

• gaps in the fossil record tell us all of the detailed changes to life on Earth during that gap.

• fossilized clocks from millions of years ago tell us exactly what time it was when specific events happened.

Tags

NGSS.MS-LS4-1