flowers are the reproductive organs of plants (both male and female parts)
pollen contains nucleus (male gamete) and is not capable of locomotion so plants needs to transfer the pollen from the anther to stigma by other means (wind and insects or animals eg birds, bats)
label
A) carpel
B) stigma
C) style
D) ovary
E) nectary
F) sepal
G) filament
H) anther
I) stamen
J) petal
label
A) protects
B) unopened
C) brightly
D) coloured
E) attract
F) produces
G) releases
H) pollen grain
I) top
J) collects
K) produces
L) ovum
M) contains
N) ovary
label
A) contains
B) gamete
C) ovule
D) egg
E) pollen tube
F) ovary
G) fruit
H) seed
insect pollinated (pollinating agents)
to collect nectar for energy and brush against the anthers which deposit sticky pollen onto the body
insects may brush against the stigma of another flower and deposit some of the pollen -> pollination
the style makes sure that the pollen is from a compatible flower
label
A) large
B) push
C) stamen
D) nectar
E) larger
F) sticky
G) spiky
H) attach
I) inside
J) stiff
K) firmly
L) brush
M) inside
N) sticky
O) pollen
P) stick
Wind pollinated
more random
when ripe, the anthersopen and shed their pollen into the open air - blown by the wind / carried by aircurrents until it lands on the stigma of a plant of the same species -> pollination
label
A) anther
B) filament
C) stigma
D) style
E) ovary
label
A) small
B) dull
C) energy
D) large
E) chance
F) smooth
G) small
H) light
I) blown
J) outside
K) swinging
L) loose
M) long
N) filaments
O) pollen
P) outside
Q) feathery
R) catch
S) drifting
T) pollen grains
cross and self pollination
cross - pollen from 1 plant transferred to stigma of another of same species
cross pollination increasesgeneticvariation
self - pollen on ownstigma or stigma of flower on same plant
all gametes come from same parent - reduces genetic variation (genetically identical) - less likely offspring will have adaptations that suit new conditions