development of the fruit and seed

Question 1

define a fruit

Answer 1

a structure developing from the ovary wall containing one or more seeds

Question 2

define a seed

Answer 2

a structure developed from the fertilised ovule containing an embryo and food store enclosed within the Testa

Question 3

outline the events of the formation of a fruit and seed

Answer 3

1) the diploid zygote divides by mitosis becoming an embryo consisting of a plumule and radicle, along with one or two cotyledons
2) the triploid endosperm develops into a food store providing nutrients for the developing embryo
3) outer integuments dry out, harden and becomes waterproof becoming Testa
4) the ovule becomes the seed
5) the ovary becomes the fruit

Question 4

what does the triploid endosperm turn into

Answer 4

a food store or nutrient supply

Question 5

what does the embryo consist of

Answer 5

1) the plumule which is the developing shoot

2) the radical which is the developing root

Question 6

what do the outer integument walls turn into

Answer 6

the testa

Question 7

what turns into the seed

Answer 7

the ovule comprising of the embryo, endosperm and testa

Question 8

what is a dicotyledon

Answer 8

a species whose seeds have two cotyledons where the embryo lies between them and the endosperm is absorbed into the cotyledons

Question 9

what is a monocotyledon

Answer 9

a species seed who only has one cotyledon and the endosperm remains as the food store and the cotyledon remains small and doesn’t develop further

Question 10

give an example of a dicotyledon and monocotyledon

Answer 10

D- broad bean

M= maize

Question 11

compare a monocotyledon and dicotyledon

Answer 11

m= one cotyledon seed, leaf veins are parallel, vascular bundle scattered in stems and roots

d- 2 cotyledons, leaf veins form a network, vascular bundles in a ring in stems and in the centre of roots