Plant Tropisms

Warm-up: Hand in graphing activity to Ms. Nagle. Then, in your science journal

Today’s Goal: I can explain how plants respond to the environment

Turn to page 118. Silently read page 118 and 119 Plant Tropism- Light and Gravity. Stop at Seasonal Responses. Define Tropism.

Homework: • Complete ALL REVIEW SHEETS AT END OF PACKET• Botany Test Tuesday May 12

Plant Responses to the Environment

What do you notice about all of the sunflowers in this field?

Growth in response to a stimulusStimuli that effect plant growth:

Light (phototropism)Gravity (gravitropism)Water (hydrotropism)

Positive tropism grows towards stimulusNegative tropism grows away from stimulus

Plant TropismsOften, we don’t think of plants as being real organisms

because they don’t think or move around.

While they may not move

consciously (or very quickly)

plants do respond to changes in the

environment.

Phototropism

Remember, this all occurs at the cellular level!

No brain required!

GravitropismHave you ever

seen a tree growing out of

embankment like this?

Why does this happen?

Thigmotropism

Remember, this all occurs at the cellular level!

No brain required!

Organisms response to contact

Thigmotropism

Remember, this all occurs at the cellular level!

No brain required!

Organisms response to contact

Limiting FactorsWhat do you think is meant by “limiting factor”?

What are the different things that plants need in order to survive…without which their growth would be limited?

What gas could be considered a limiting factor for humans but

NOT for plants?

TEST REVIEW

Warm-up: Turn to reviews in your packet. Then, in your science journal

Today’s Goal: I can explain how plants respond to the environment

Explain the difference between vascular seed plants and vascular seedless plants.

Homework: • Botany Test TOMORROW STUDY!

Practice Quiz

1) What type of vascular tissue is responsible for transporting water and minerals from the roots to the leaves?

Practice Quiz

2) What do a leaf’s stomata allow to enter into a leaf?

Practice Quiz

3) Name an example of a seedless vascular plant:

Practice Quiz

4) What is the chemical formula for glucose?

Practice Quiz

5) On what part of the stamen do the pollen grains form?

Practice Quiz

6) On what part of the pistil must the pollen grains land in order to reach the ovules in the ovary?

Practice Quiz

7) What are the upper and lower cell layers of a leaf called?

Practice Quiz

8) What plant group includes conifers, ginkgoes, cycads and other cone-bearing plants with needles?

Practice Quiz

9) During what process do animals take in oxygen and release CO2 (the exact opposite of photosynthesis)?

Practice Quiz

10) Which part of a flower develops into the fruit once it has been pollinated?

Practice Quiz

1) What type of vascular tissue is responsible for transporting water and minerals from the roots to the leaves?

xylem

Practice Quiz

2) What do a leaf’s stomata allow to enter into a leaf?

CO2

Practice Quiz

3) Name an example of a seedless vascular plant:

fern

Practice Quiz

4) What is the chemical formula for glucose?

C6H12O6

Practice Quiz

5) On what part of the stamen do the pollen grains form?

anther

Practice Quiz

6) On what part of the pistil must the pollen grains land in order to reach the ovules in the ovary?

stigma

Practice Quiz

7) What are the upper and lower cell layers of a leaf called?

epidermis

Practice Quiz

8) What plant group includes conifers, ginkgoes, cycads and other cone-bearing plants with needles?

gymnosperm

Practice Quiz

9) During what process do animals take in oxygen and release CO2 (the exact opposite of photosynthesis)?

cellular respiration

Practice Quiz

10) Which part of a flower develops into the fruit once it has been pollinated?

ovary