Spring Quarterinstructor: Sue Kloss

BotanyLake TahoeCommunity College

Spring QuarterInstructor: Sue Kloss

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Chapter 6- Lesson Outline, Terms, and Objectives

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I. Functions of leaves

A. major functions of leaves

B. leaves are shaped to capture light

1. dicot and monocot leaves

2. leaves are simple or compound

3. the petiole

4. the sheath

5. leaf veins

C. arrangement of leaf cells depends on their functions

1. epidermis

a. stomates

b. more numerous on the bottom

c. guard cells

d. trichomes

e. insectivores

2. mesophyll

3. veins consist of vascular bundles that transport food and water

D. Where do new leaves come from?

1. origin

II. leaf form and specialized leaves

A. a leaf’s form may depend on the plant’s age and on the environment

1. cotyledons

2. heterophylly

3. xerophyte

4. hydrophytes

5. mesophytes

6. some leaves are modified for special functions

III. Commercially important fibers from leaves and stems

A. fibers from plants

1. cotton

2. elongated schlerenchyma fibers

3. hard fibers

4. soft fibers

Botany - Chapter 6

abscission

auricles

blade

boundary layer

bulbs

bundle sheath

compound leaves

cuticle

guard cells

fibers

heterophylly

hydrophytes

intercalary meristem

leaf primordium

leaf veins

ligule

mesophyll

mesophytes

midvein (midrib)

netted venation

palisade parenchyma

parallel venation

petiole

seed leaves or cotyledons

sessile

shade leaves

sheath

simple leaves

soft fibers

spines

spongy parenchyma

stipules

stomate (stomata)

substomatal chamber

subsidiary cell

sun leaves

tendrils

transpiration

trichomes

vascular bundles

vegetative reproduction

xerophytes

Chapter 6

1. What are the 2 major functions of leaves?
2. Distinguish between simple and compound leaves, and describes common types of each.
3. How do you distinguish between a leaf and a leaflet?
4. What is a petiole and what are its functions?
5. What is a sheath? What types of plants typically have sheaths? What are auricles and ligules?
6. What are leaf veins? What types of venation patterns are typical in most plants? Distinguish/draw 2 major groups of plants by their venation patterns.
7. Describe the types of cells that compose the epidermis. What is a stomate, how is it constructed, how does it work?
8. What is leaf mesophyll typically composed of, what is the function of various layers? Draw/label the interior of a leaf.
9. Describe/draw the structures making up the veins in a leaf.
10. Where do leaves have their origin? Describe/draw and label.
11. What are cotyledons? Distinguish between monocots and dicots. What types of plants are all monocots and dicots?
12. Describe a common type of heterophylly.
13. Describe/ draw variations in leaf adaptations, depending on the environment of the plant. Distinguish between xerophytes, mesophytes and hydrophytes.