Plants can adapt too! • Plants have certain adaptations to help them survive (ex-A cactus will store water to survive longer without available rain.)
We all know…. …Plants have roots. • What is the purpose for this adaptation? • Why do roots grow downward?
We all know…. • What is the purpose for this adaptation? A plant needs roots for two chief reasons: as a means of anchor age or support, and to absorb water and mineral salts from the soil. • Why do roots grow downward? Roots grow toward and reach for water.
In Plants… • Plants have xylem • This tissue is responsible for carrying water up the stems of plants to leaves.
Stimulus and Response… • An organisms behaviors are in response to a stimulus from their environment. • A stimulus is any event or happening that causes a response (ex-Someone calls your name… you turn around)
Regulation • Living organisms regulate their internal conditions to balance their exterior environment. • Homeostasis is like a continuous circle of adjustments and corrections
A Response to Sunlight or Gravity?? What will this plants roots look like?
Geo + Tropism • A "tropism" is a plant movement triggered by stimuli. • The term "geotropic" refers to a plant whose roots grow down into the soil as a response to gravity.
Examples…In Plants • Plants control themselves with water
Examples…In Plants • What structure allows water to move through the stem of plants?
Examples…In Plants • What structure allows water to move through the stem of plants? XYLEM
Review- List the organelle with its function • Vacuole • Cell Wall • Membrane • Nucleus • Mitochondria • Cytoplasm
Osmosis & Diffusion • Solute-A solute is dissolved in another substance, known as a solvent. (NaCl or C6H12O6) • Solvent- A solvent is a liquid or gas that dissolves a solid, liquid, or gaseous solute, resulting in a solution. (The most common solvent in everyday life is water )
Permeability…. • A measure of the ability of a porous material to allow fluids to pass through it.
Osmosis & Diffusion • Osmosis is the movement of solvent molecules through a selectively permeable membrane into a region of higher solute concentration, aiming to equalize the solute concentrations on the two sides.
Diffusion Diffusion describes the spread of particles through random motion from regions of higher concentration to regions of lower concentration.