Plant Biology

Question 1

How is pollen formed

Answer 1

Within pollen sacs in the anther

Question 2

How does pollination occur

Answer 2

When pollen grains are carried away insects, birds, wind etc. to other plants of same species, some planets self-pollinate

Question 3

Sclerenchyma features

Answer 3

thick cell walls, important for support (physical), dead cells, trees and plant grow upright

Question 4

xylem features

Answer 4

transport H20 and nutrient up plant, dead lignified cells, provide structural suppose (trees)

Question 5

phloem

Answer 5

transport sugar to top & bottom of plant, alive, non lignified

Question 6

what causes an increase in diameter

Answer 6

later growth (2ndary growth)

Question 7

describe plant transport

Answer 7

move h2o from soil up stems & leaves. roots take up h2o from leaves in phloem, root hairs increase SA in absorption

Question 8

describe plant transport

Answer 8

move h2o from soil up stems & leaves. roots take up h2o from leaves in phloem, root hairs increase SA in absorption, nutrients taken up

Question 9

e.g. of macronutrients

Answer 9

nitrogen, K, Na, phosphorous, Ca, Mg

Question 10

e.g. of micronutrients

Answer 10

Fe, boron, Zn, maganese, copper

Question 11

macro and micro nutrients are needed in low are high concentrations

Answer 11

macro high, micro low

Question 12

anions

Answer 12

-ive charge, easy to take up

Question 13

cations

Answer 13

+ively charged, binds to soil particles

Question 14

water loss from stomata causes what

Answer 14

h20 deficit higher up tree. creates -ive tension in leaves. pulls h20 up xylem from roots. this is called transpirational pull

Question 15

aniline blue features

Answer 15

phloem sleve areas= light blue, cal lose in sleeve plates (if present) = dark blue

Question 16

acid phloroglucinol is only for

Answer 16

lignified tissues =dark red

Question 17

toluidine blue features

Answer 17

lignified tissues (schlarchyma) = aquamarine, protenaceous tissues (parachyma & cytoplasm)= purple, polyaranaids & pectin = dark pink

Question 18

if too much h20 lost in transpiration what happens

Answer 18

stomata wil c lose

Question 19

name adaptations of plants in hot dry climate

Answer 19

size of leaf reduced, increase cuticle thickness, fleshy leaves store h20, stomata close in day, open night, stomata position deeper in leaves

Question 20

name plant that is adapted to hot dry climate

Answer 20

xerophytes

Question 21

describe sugar movement in phloem

Answer 21

sugars move from leaves to parts of plant

Question 22

what are sinks

Answer 22

location where sugar is needed

Question 23

what are sources

Answer 23

where sugar is produced (leaves)

Question 24

sugars located in the

Answer 24

phloem sap (where syrup comes from)

Question 25

describe sucrose movement via pressure flow

Answer 25

high conc. of sugar in leaves attract h20 into cells. cells build pressure causes sugar to move down plant. sucrose moves in & out cell via co-transport and ATP pump