Hcs 120 Midterm 2

Front 1

transpiration

Back 1

water loss thru leaves

Front 2

what environmental factors influence transpiration

Back 2

temperature: higher temp = higher transpiration
humidity: higher humid = lower transpiration
air current= more wind, more transpiration

Front 3

the transpiration rate will double for how many degree rise in temperature

Back 3

10 degrees

Front 4

why does transpiration increase when it is windy?

Back 4

wind will strip the boundary layer, which controls the amount of water loss

Front 5

how do plants CLOSE their stomatal openings?

Back 5

move potassium ions out of guard cell, and water follows it due to osmosis
-active transport (req. energy)

Front 6

how do plants OPEN their stomatal openings?

Back 6

potassium ions move inside, water follows. causes stomates to open by turgor pressure

Front 7

phloem loading

Back 7

active process in which sugar is moved to the sieve tube of the phloem for transportation

Front 8

why is phloem loading an active process

Back 8

bc sugars are being moved from low concentration to high concentration

Front 9

what is phloem sap

Back 9

the product of the sugar produced and the water mixing in the sieve tube before being transported to the "sink"

Front 10

aphids

Back 10

small insectes who eat phloem sap

Front 11

water potential

Back 11

the energy present due to its position.
water will move from any area of high concentration to low concentration

Front 12

diffusion

Back 12

random molecular movement into equal concentration

Front 13

osmosis

Back 13

movement of water from high concentration to low concentration through a membrane

Front 14

is osmosis a passive or active movement?

Back 14

passive

Front 15

bulk flow

Back 15

movement together in one direction due to pressure gradient

Front 16

absorption by roots

Back 16

water enters the root by osmosis
salt is higher in roots than soil so water will enter roots

Front 17

cohesion tension theory

Back 17

water will bond to itself and other substances

Front 18

is water being pushed or pulled through the plant

Back 18

both
root pressure: push
transpiration: pull

Front 19

what is the driving force of water movement

Back 19

transpiration by leaves
as the plant transpires, it pulls more water up

Front 20

do plants have determinate or indeterminate growth?

Back 20

indeterminate

Front 21

are plant organs determinate or indeterminate

Back 21

determinate

Front 22

propagation

Back 22

human intervention in cross a plant

Front 23

haploid

Back 23

getting the same amount of eggs from the father and mother

Front 24

diploid

Back 24

contain two sets of chromosomes

Front 25

annual

Back 25

goes from seed to producing seed in one year