(8.6)   The student knows that interdependence occurs among living systems. The student is expected to:

      *A  Describe interactions among systems in the human organism;

      *B  Identify feedback mechanisms that maintain equilibrium of systems such as body temperature, turgor pressure, and chemical reactions;

8th grade TAKS Objective 2

The student will demonstrate an understanding of living systems and the

environment.

(8.6)   The student knows that interdependence occurs among living systems. The student is expected to:

      C.  Describe interactions within ecosystems.

(8.11)   The student knows that traits of species can change through generations and that the instructions for traits are contained in the genetic material of the organisms. The student is expected to:

      *A.  Identify that change in environmental conditions can affect the survival of individuals and of species;

      *B.  Distinguish between inherited traits and other characteristics that result from interactions with the environment; and

      *C.  Make predictions about possible outcomes of various genetic combinations of inherited characteristics.

(8.14)   The student knows that natural events and human activities can alter Earth systems. The student is expected to:

      *B.  Analyze how natural or human events may have contributed to the extinction of some species;

8th grade TAKS Objective 2

The student will demonstrate an understanding of living systems and the

environment.

8th grade TAKS Objective 5

The student will demonstrate an understanding of Earth and Space systems.

(8.12)   The student knows that cycles exist in Earth systems. The student is expected to:

      *C.  Predict the results of modifying the Earth's nitrogen, water, and carbon cycles

(8.14)   The student knows that natural events and human activities can alter Earth systems. The student is expected to:

    C.  Describe how human activities have modified soil, water, and air quality.

;

8th Grade TAKS Objective 5

The student will demonstrate an understanding of Earth and Space systems.