science flash cards
External Stimulus
A change in the environment outside of the organism.
Turgor Pressure
Pressure exerted by water inside the cell on the cell wall.
Feedback Mechanism
A response within a system that influences the activity of that system.
Root System
below-ground part of a plant that includes the organs such as roots,tubers,rhizomes
Motion
A change in the position of an object
Phototropism
growth that happens in organisms in response to light, such as a stem bending toward a light source.
Stable
Balanced; unchaning
Tropism
Turning of all or part of an organism in a particular direction in response to an external stimulus.
Geotropism
growth that happens in organisms in response to gravity, such as the downward growth of plant roots.
Shoot System
above-ground part of a plant that includes the organs such as leaves,buds,stems,flowers/fruits(if the plant has any).
Stimulus
A thing or event that causes a response or reaction.
Homeostasis
The body’s ability to keep the internal balance of the body stable
Xylem
Vascular tissue in plants that transports fluid through the plant.
Internal Stimulus
A change within the organsim
Transpiration
Process of water moving through plants and evaporating from the leaves and stems into the atmosphere.
