Leaf Structure and Function

Question 1

Blade

Answer 1

broad, flat portion of the leaf

Question 2

petiole

Answer 2

stalk that attached the blade to the stem

Question 3

Stipules

Answer 3

small, leaflike outgrowths from the base

Question 4

List the 3 types of leaf venation

Answer 4

Parallel
Palmately Netted- several main veins radiating from one point
Pinnately Netted- veins branching along entire length of midvein

Question 5

Subsidary Cells

Answer 5

provide reseriover of water and ions

Question 6

Ions move into and out of guard cells as they change shape during ______ opening and closing.

Answer 6

stomatal

Question 7

What is mesophyll?

Answer 7

photosynthetic parenchyma cells

Question 8

Pallisade Mesophyll

Answer 8

functions primary for photosynthesis

Question 9

Sponge Mesophyll

Answer 9

functions primary for gas exchange

Question 10

Bundle sheath

Answer 10

surronds xylem and phloem

Question 11

What type of venation does monocot leaves have?

Answer 11

parallel

Question 12

What type of venation does dicots have?

Answer 12

netted

Question 13

In some monocots mesophyll does not have what?

Answer 13

layers

Question 14

In some monocots guard cells are shaped like what?

Answer 14

dumbbells

Question 15

Dicots have guard cells shaped like what?

Answer 15

beans

Question 16

Stomata open during the ____

Answer 16

day

Question 17

Stomata close during the night to conserve ____ when photosynthesis is not occuring.

Answer 17

water

Question 18

Leave epidermises are ______.

Answer 18

transparent

Question 19

Guttation

Answer 19

release of liquid water from some leaves through special structures

Question 20

When does guttation occur?

Answer 20

when transpiration is low and soil moisture high

Question 21

Transpiration

Answer 21

loss of water vapor primarily through stomata

Question 22

What is the seasonal removal of decidous leaves known as?

Answer 22

leaf abcisssion

Question 23

Abcission zone

Answer 23

where petiole detaches fromstem

Question 24

During leaf abscission chlorophyll breaks down and ___and___ become evident.

Answer 24

carotenoids

anthocyanians

Question 25

Spines

Answer 25

leaves adapted to deter herbivors (cactus)

Question 26

Tendrils

Answer 26

leaves modified for grasping and holding other structures

Question 27

Bud scales

Answer 27

leaves modified to protect delicate meristematic tissue or dormant buds

Question 28

Bulbs

Answer 28

short, underground stems with fleshy leaves that are specialized for storage

Question 29

Succulent leaves

Answer 29

for water storage in plants living in arid conditions