Lab 5 - Leaf

Question 1

attaches to the stem

Answer 1

Petiole

Question 2

flattened portion which maximizes surface area for exposure to sunlight

Answer 2

Blade

Question 3

leaves form a “spiral staircase” arrangement around the stem.

Answer 3

Spiral

Question 4

leaves are attached directly across from one another.

Answer 4

Opposite

Question 5

leaves are staggered on either side of the stem.

Answer 5

Alternate

Question 6

simple leaf

Answer 6

a single, undivided blade

Question 7

compound

Answer 7

the blade divided into several “leaflets”

Question 8

Veins in monocots (venation)

Answer 8

parallel

Question 9

Veins in eudicots (venation)

Answer 9

forms a network pattern

Question 10

forms the outer skin

Answer 10

epidermis

Question 11

the top surface of the leaf

Answer 11

upper epidermis

Question 12

covers upper epidermis for protection

Answer 12

wax cuticle

Question 13

on the underside of the leaf

Answer 13

underside of the leaf

Question 14

openings in epidermis that allow intake of CO2 and release of O2

Answer 14

stomata

Question 15

surround and open/close the stoma

Answer 15

guard cells

Question 16

made of columnar cells, contain most of the chloroplasts

Answer 16

palisade mesophyll

Question 17

under the palisade layer, irregular shaped cells with spaces to allow gas exchange

Answer 17

spongy mesophyll

Question 18

among the mesophyll tissue, provides structural support

Answer 18

vascular tissue (veins/vascular bundles)

Question 19

part of vascular tissue, transport water and minerals

Answer 19

xylem

Question 20

part of vascular tissue, transport photosynthetic materials

Answer 20

phloem