Lab 6

Question 1

without the cuticle and – the leaf would dry out within a few hours, like a piece of paper, whenever soil moisture becomes low and the roots cannot supply water rapidly enough

Answer 1

closed stomates

Question 2

stomates are the – line of defense

Answer 2

last

Question 3

stomates open when water supply and other environmental conditions are suitable and permit the rapid entry of

Answer 3

CO2

Question 4

Experiment 1: measure the rate of water loss from plant leaves by – and diffusion out of stomates

Answer 4

evaporation

Question 5

– will provide info on water loss per unit time (ml H2O minute -1)

Answer 5

potometer

Question 6

Experiment 1 species

Answer 6

native CA shrub Heteromeles arbutifola (Rosaceae)

Question 7

Experiment 1: keep the – end moist and not to cover it with parafilm

Answer 7

cut end

Question 8

purpose of parafilm is to make a – between the tubing and the stem

Answer 8

good seal

Question 9

how to tell if the seal is good if…

Answer 9

the water will not leak out

Question 10

If you see any leaks, remove the plant from the photometer and –

Answer 10

wrap more parafilm around the stem

Question 11

read from the – part of the meniscus

Answer 11

convex

Question 12

Experiment one last setting:

Answer 12

hot wind may damage leaves

Question 13

transpiration = difference in –

Answer 13

water volume in potometer

Question 14

Experiment 2

Answer 14

stomatal density and size

Question 15

of stomates

Answer 15

10-several thousand

Question 16

stomates on upper and lower leaf epidermis

Answer 16

amphistomatous

Question 17

stomates on lower leaf epidermis

Answer 17

hypostomatous

Question 18

species that have large stomates typically have –

Answer 18

fewer per mm^2

Question 19

Experiment 2: avoid leaves with –

Answer 19

trichomes

Question 20

Experiment 2: avoid fields including a –

Answer 20

vein

Question 21

stomatal density

Answer 21

of stomata/area of FOV

Question 22

bamboo (poaceae), palms, barley

Answer 22

monocots

Question 23

Fiscus racemosa, Macadamia integrifolia

Answer 23

Dicots

Question 24

podocarpus species, Gingko biloba

Answer 24

gymnosperms

Question 25

tree ferns, polypods, Adiantum

Answer 25

fern

Question 26

leaf size can vary 10,000 fold across species and shows adaptation and plasticity in response to many factors such as light, herbivory, nutrients, and --

Answer 26

water availability

Question 27

best known biogeographic trend in plant form is for leaves to be -- in drier areas

Answer 27

smaller