Name: _____________________
Date: ____________________
Class: A2/B2/C2
Horticulture test #3
Internal structure of the leaf and types of tropism.
Section I: Match the parts with its function. Write the letter on the line provided.
A
1.
2.
3.
4.
5.
6.
7.
8.
Stomata
Mesophyll
Guard cells
Lower epidermis
Air spaces
Chloroplast
Waxy cuticle
Upper epidermis
B
a. Let’s carbon dioxide move towards the
surface
b. Bottom part of the leaf that lets gases
enter the leaf
c. Contains lots of palisade cells, where
most of the photosynthesis occurs.
d. The small opening in the leaf that lets
gases in and out
e. Stops water evaporating from the cell in
the leaf
f. Controls the stoma, can shut it to
control water loss
g. Let’s light through to the palisade cells
h. Found in the palisade cells, special
structure for photosynthesis
Section II: label the internal and external structure of the leaf
S
Section III: Fill in the blanks
Use the word bank provided to complete each sentence. Each answer in the word bank has a letter in
front of it, only right the letter to indicate the answer of your choice.
Word Bank:
a. ROOTS
h. GEOTROPISM
b. NEGATIVE GEOTROPISM
i.
GRAVITY
c. POSITIVE THIGMOTROPISM
j.
SHOOTS
d. STIMULUS
k. TROPISM
e. THIGMOTROPISM
l.
f.
NEGATIVE THIGMOTROPISM
g. POSITIVE GEOTROPISM
POSITIVE PHOTOTROPISM
1. What is the term that describes how a plant responds to gravity?
2. A plant that grows toward a light source is showing ________.
3. What part of a plant is most likely to grow toward a light source?
4. What part of a plant is most likely to show negative phototropism?
5. A _______ is anything that causes a reaction.
6. The term for a plant’s response to touch is ________.
7. Plant roots usually respond to gravity by demonstrating _________.
8. When a plant’s roots move away from an object they touch, this is called _____.
9. When a plant that is placed on its side starts to bend and grow upward, it is responding to the
earth’s _______.
10. The response that plant shoots have to gravity is ______.
11. The tendrils of a plant wrapping around a garden stake is an example of ________.
12. In general, a _________ is a movement a plant makes in response to something in its
environment.
Section IV: True or False
In this section, you are to carefully read the sentences and indicate if it is TRUE or FALSE.
1. Hydrotropism is when a plant moves towards the sun.
2. Phototropism is when you take a picture of a plant.
3. Tropisms is when a plant responds towards or away of the stimulus.
4. Thigmotropism is when a plant reacts to a touch of an outer force.
5. Phototropism is the exact same thing as photosynthesis.
6. Hydrotropism, hydro means H2O. meaning the plant will grow towards water.
7. Tetrotropism is a type of tropism.
8. The plant needs sunlight, water and carbon dioxide for photosynthesis.
9. A plant can grow under the light of a lamp.
10. Translocation happens in the xylem of the vascular bundle.
SECTION V: short answers
1. List 6 macro-nutrients and 6 micro-nutrients.
2. Explain the function of Nitrogen and the symptom of the deficiency if Nitrogen is not present.
3. What is metabolism.