reproduction in plants

Question 1

features of sexual reproduction in plants

Answer 1

gametes produced. fertilisation takes place (i.e male gamete fuses with female gamete). There is genetic variation in offspring. survival value in changing environment. involves male gametes in pollen female gametes which are the ova carried out through wind or by insects

Question 2

features of asexual reproduction in plants

Answer 2

no gametes produced. no fertilisation. no variation in genes. beneficial in stable environment. usually involve a part growing and breaking off and developing into a new plant. or by cuttings taking a piece of plant stem with some leaves on it and putting it in damp soil/compost

Question 3

male part of the flower. and male gamete

Answer 3

called the stamen. consists of anther and filament. male gamete made in anther and is found inside the pollen grain.

Question 4

female part of flower

Answer 4

called the carpel. consists of stigma, style, ovary, and ovule. female gamete is found in the ovule and is called an ovum

Question 5

petals

Answer 5

attract attention from pollinator

Question 6

anther

Answer 6

produces pollen

Question 7

filament

Answer 7

holds up anther

Question 8

stigma

Answer 8

catches pollen for pollination

Question 9

style

Answer 9

supports the stigma

Question 10

ovary

Answer 10

holds and protects ovules

Question 11

ovules

Answer 11

produce ova

Question 12

Nectary

Answer 12

produce nectar to attract pollinators

Question 13

sepals

Answer 13

protection for the bud

Question 14

differences between wind and bug pollinated flowers

Answer 14

anther exposed to wind so pollen can blow away. stigma are feathery to catch pollen. petals are small and green and no nectar or scent is produced as it does not need to attract pollinators.

Question 15

formation of seed and fruit

Answer 15

zygote develops into embryonic plant with radicle and plumule.
other content of ovule develops into food store for germination.
ovule wall becomes the seed coat/testa.
ovary wall becomes fruit coat

Question 16

parts of a seed

Answer 16

testa
cotyledon
micropyle
plumule
radicle

Question 17

testa

Answer 17

tough seed coat

Question 18

cotyledon

Answer 18

food store

Question 19

micropyle

Answer 19

hole made by pollen tube

Question 20

plumule

Answer 20

embryo shoot

Question 21

radicle

Answer 21

embryo root

Question 22

process of sprouting

Answer 22

enzymes break down starch into maltose and glucose to used in respiration to provide energy for growth. radicle grows out first so plant can access water, then plumule grows so can access light for photosynthesis.

Question 23

factors necessary for germination

Answer 23

warm temperature - enzymes
water - for chemical reactions to take place in solution
oxygen - for respiration

Question 24

practical

Answer 24

four boiling tubes one with seeds wet and wet cotton wool the next with dry cotton wool the third with seeds placed in boiled water but cooled to 20˚C and oil on top and one with wet cotton wool but placed in a fridge. only the first one and last one will germinate but the first one will germinate faster. second and third will not germinate as 2 has no water and 3 has no air