sexual reproduction of flowering plants

Question 1

explain fruit formation by plants

Answer 1

to protect seeds

Question 2

function of stigma

Answer 2

where pollen lands after pollination

Question 3

function of anther

Answer 3

produces pollen

Question 4

function of sepal

Answer 4

protect the flower

Question 5

describe insect pollination

Answer 5

petals are bright, coloured, scented with nectarsd

Question 6

describe wind pollination

Answer 6

petals are small, not brightly coloured

Question 7

what does the ovule develop into if fertilisation occurs

Answer 7

seed

Question 8

name a suitable seed that you used

Answer 8

radish seeds

Question 9

how did you deprive the seeds of oxygen

Answer 9

placed them in boiled water with a layer of oil on top

Question 10

what type of agar did you use

Answer 10

starch

Question 11

how did you know digestion had occurred

Answer 11

iodine remained a blue black colour where the seed had been

Question 12

explain pollination

Answer 12

transfer of pollen from the anther to the stigma of a flower of the same species

Question 13

explain cross pollination

Answer 13

transfer of pollen from the anther to the stigma of a different

Question 14

explain self pollination

Answer 14

transfer of pollen from an anther to a stigma od the same place

Question 15

name two ways in which cross pollination can occur in flowering plants

Answer 15

insect
wind pollination

Question 16

describe what happens to the generative nucleus following pollination

Answer 16

divides by mitosis

Question 17

state the collective term used to describe the anther and filament of the flower

Answer 17

stamen

Question 18

name two methods by which pollination can occur

Answer 18

wind
insect

Question 19

describe the main events that occur immediately after pollination

Answer 19

pollen grain germinates
produces pollen tube
generative nucleus divides by mitosis - forms to male nuclei

Question 20

state the location where food is usually stored in monocle seed

Answer 20

endosperm

Question 21

state the location where food is usually stored in dicot seed

Answer 21

cotyledon

Question 22

name one part of a flower from which a fruit may develop

Answer 22

ovary

Question 23

outline one role of genetics in fruit production

Answer 23

seedless fruits

Question 24

give two advantages of seed dispersal

Answer 24

avoids overcrowding
increases chance of survival

Question 25

describe the role of digestion in germination

Answer 25

produce soluble nutrients

Question 26

describe the role of respiration in germination

Answer 26

release of energy from food

Question 27

give one example of asexual reproduction in flowering plants

Answer 27

vegetative propagation

Question 28

give one disadvantage of self pollination

Answer 28

less variation

Question 29

which part develops into a fruit

Answer 29

ovary

Question 30

give one way seedless fruits may develop

Answer 30

auxins

Question 31

explain germination

Answer 31

regrowth of an embryo

Question 32

explain dispersal

Answer 32

spreading of seeds away from parent plant

Question 33

explain dormancy

Answer 33

period of no growth

Question 34

outline how dormancy in seeds benefits plant species

Answer 34

provides time for dispersal

Question 35

give two roles of water in the process of germination

Answer 35

softens testa
activates enzymes

Question 36

identify two possible food stores in seeds

Answer 36

cotyledon
endospore

Question 37

state three factors necessary fro successful germination

Answer 37

warmth
oxygen
water

Question 38

why were the seeds soaked in water prior to the investigation

Answer 38

softens testa

Question 39

describe how you further prepared the seeds and added them to the agar plates

Answer 39

split the seeds
sterilise the seeds
place flat/ cut side onto the agar

Question 40

under what conditions did you store the plates contain gin the seeds to allow germination to occur

Answer 40

incubator

Question 41

describe the events that happened to a mature pollen grain following pollination up to double fertilisation

Answer 41

pollen tube grows down the style
the generative nucleus divides by mitosis into 2 haploid Male gametes
they enter the embryo sac
one fuses with egg, the other fuses with polar nuclei

Question 42

give two adaptions of wind pollinated flowers that increase their chance of successful pollination

Answer 42

stigmas large, feathery
anthers longer and outside

Question 43

state to advantages of sexual reproduction versus asexual reproduction in plants

Answer 43

less overcrowding
less competition

Question 44

outline what happens during each fertilisation

Answer 44

one male game fuses with the egg
one male gamete fuses with the two polar nuclei

Question 45

state what is produced by each fertilisation

Answer 45

zygote
triploid endosperm