Leaves

Question 1

abcission

Answer 1

he natural detachment of parts of a plant, typically dead leaves and ripe fruit.

Question 2

blade

Answer 2

a leaf’s flat portion

Question 3

netted venation

Answer 3

Smaller and smaller veins branch off from the larger veins to form a net

Question 4

compound leaf

Answer 4

has a blade divided into two or more leaflets; divided into pinnately compound & palmately compound

Question 5

palisade mesophyll

Answer 5

contains columnar cells stacked closely together and is the main site for photosynthesis; may have more layers in direct sunlight.

Question 6

petiole

Answer 6

the stalk attaching the blade to a stem

Question 7

parallel venation

Answer 7

veins running parallel towards each through the entire leaf

Question 8

simple leaf

Answer 8

has a single blade

Question 9

spongy mesophyll

Answer 9

contains the cells arranged loosely and irregulary and functions primarily in gas diffusion

Question 10

mesophyll

Answer 10

composed mostly of chloroplast-containing parenchyma cells; two sub layers

Question 11

stoma

Answer 11

any of the minute pores in the epidermis of the leaf or stem of a plant, forming a slit of variable width that allows movement of gases in and out of the intercellular spaces.

Question 12

guard cell

Answer 12

have chloroplasts and associated with subsidiary cells; change in the shape of gaurd cells opens and closes the stoma

Question 13

subsidary cell

Answer 13

A plant epidermal cell that is located next to a guard cell in the stoma of a leaf and differs in structure from other epidermal cells.

Question 14

trichome

Answer 14

hairlike structures; reduce water loss from leaf surface; may secrete stinging irritants; may excrete excess salts

Question 15

vascular bundle sheath

Answer 15

contains one or more layers of parenchyma or sclerenchyma cells; may extend towards both upper and lower epidermis ; form extensions

Question 16

A sessile leaf, by definition, lacks a…

Answer 16

petiole

Question 17

Plants that grow completely submerged have leaves with…

Answer 17

no stomata

Question 18

Which of the following statements about palisade parenchyma is FALSE?

Answer 18

it is usually located on the lower side of the leaf

Question 19

Unlike the leaves of dicots, most monocot leaves…

Answer 19

have parallel veination

Question 20

Most photosynthates are collected from leaf mesophyll cells by:

Answer 20

bundle sheath

Question 21

Which of the following statements about bulliform cells is FALSE?

Answer 21

they are large mesophyll cells