1. What are tissues?

2. What is an organ made of?

3. Why does a multicellular organism have several organ systems?

4. What is an adaptation?

Page 51Plants are Producers

If you stand outside on a warm, sunny day, you may see and feel energy from the sun.

Without the sun’s energy, Earth would be a cold, dark planet.

Plants capture energy from the sun . . .

The sun provides the energy for almost all organisms to live.

The sun’s energy cannot drive cellular processes directly.

Light energy must be changed to chemical energy in order to be used.

Plants can convert light energy into chemical energy.

Capturing energy from sunlight and converting it to chemical energy.

6CO2 + 6H2O => C6H12O6 + 6O2

Photosynthesis

Organism that captures energy from the sun and uses it to produce food.

( pg 52)Is a organism that does not

require an outside food source

Autotrophs

Remember…plants are not the only organisms that capture energy through photosynthesis. Algae, certain bacteria, and protists can too!

Plants are multicellular organisms w/parts of their bodies specialized for storing energy-rich material. Single-celled producers can store very little energy.

Only part of the energy captured by a plant is used as fuel for cellular processes. Some is stored as starches.

Storing and releasing energy . . .

Starch is an energy-rich compound made of many sugars.

Starches can store a lot of chemical energy.

When a plant needs energy, the starches are broken back down into sugars and energy is released.

Starches . . .

It is a process during which a cell uses oxygen to break down sugars and release energy. (Opposite chemical reaction of photosynthesis.)

C6H12O6 + 6O2 => 6CO2 + 6H2O

What is cellular respiration?

Some plants, such as grasses, can grow in many environments.

Grasses have deep roots that allow it to survive drought, fires, freezing, temperature and grazing, as long as the root survives.

Some trees can only grow in certain types of environments

If the leaves and stems of a tree die away because of fire or drought, often the plant will not survive. (but seeding is done)

Plants are adapted to different environments.

Some plants may reproduce quickly because of their environment.

Desert plants and mountain plants grow, flower and produce new seeds quickly because of short growing seasons.

Some plants have reproductive adaptations . . .

Some plants produce harmful chemicals or odors.

This keeps them from being eaten by insects.

Poison ivy, poison oak, & tobacco plants produce poison to keep from being eaten.

The venus fly trap captures insects and digest them to give materials that the soil lacks that they grow in.

Some plants have adaptations

that protect them.

What is a stimulus? something that produces a response

from an organism.Example: Roots growing down in response to gravity, plant growing toward light.

Page 55 ~ Mexican bird of paradise close during heat of day.

Plants respond to their environment.

Stimulus ResponseGravity roots grow downwardTouch tendrils wrap around the

things the encounter.Ex. Climbing plant

Light leaves and stems turn and bend (a hormone is produced

that acts like a chemical messenger to allow an organism to respond to changes in its body or to the environment around it)

Gravity, Touch, and Light

During summer in North America temps. Rise and days get longer.

As winter approaches, temps go down days get shorter affecting plants.

Shorter days affect sunlight available for photosynthesis.

Shorter days cause plants to go dormant, in deciduous trees leaves die, fall off & tree growth slows, requiring less energy.

Plants respond toseasonal changes.

16

Describe the connection between photosynthesis, autotrophs, and producers.

What is auxim? What does it do and how does it work?

16