TEKS

Part 2: Stimulus and Response

7.13 Organisms and environments. The student knows that a living organism must be able to maintain balance in stable internal conditions in response to external and internal stimuli. The student is expected to:

• 7.13A investigate how organisms respond to external stimuli found in the environment such as phototropism and fight or flight
• 7.13B describe and relate responses in organisms that may result from internal stimuli such as wilting in plants and fever or vomiting in animals that allow them to maintain balance

7.7 Force, motion, and energy. The student knows that there is a relationship among force, motion, and energy. The student is expected to:

• 7.7C demonstrate and illustrate forces that affect motion in everyday life such as the emergence of seedlings, turgor pressure, and geotropism.