|
Expaln the function of each of the following: 1.Coleorhiza. 2. Germ pores
|
|
0
|
2344
|
August 28, 2016
|
|
Give reasons why:
|
|
1
|
3278
|
August 28, 2016
|
|
(a) Explain the different ways apomictic seeds can develop.Give an exanple of each
|
|
1
|
6659
|
August 28, 2016
|
|
Draw a neat labelled diagram of L.S. of an embryo of grass
|
|
0
|
4391
|
August 28, 2016
|
|
(a)Describe the endosperm development in coconut
|
|
1
|
16892
|
August 28, 2016
|
|
Write the changes a fertilized ovule undergoes within the ovary in an angiosperm plant
|
|
0
|
6339
|
August 28, 2016
|
|
(a) Why is fertilisation in an angiosperm referred to as double to as double fertilisation?Mention the ploidy of the cells involved
|
|
1
|
3720
|
August 28, 2016
|
|
(a) Why does endosperm development precede embryo development in angiosperm seeds? State the role of endosperm in mature albuminous seeds
|
|
1
|
2644
|
August 28, 2016
|
|
(i)Given a T.S. of an apple fruit.Identify a,b,c
|
|
1
|
2924
|
August 28, 2016
|
|
Explain the process of emasculation and bagging of flowers.State their importance in breeding experiments
|
|
0
|
5314
|
August 28, 2016
|
|
Differentiate between perisperm and endosperm, giving one example of each
|
|
0
|
4523
|
August 28, 2016
|
|
Name the parts of the ovule and the embryo sac of an angiosperm that develops into:
|
|
1
|
3720
|
August 28, 2016
|
|
In angiosperms, the zygote is diploid, while the primary endosperm cell is triploid.Explain
|
|
0
|
1125
|
August 28, 2016
|
|
Describe with hlp of three labelled diagrams the different embryonic stages that include the mature embryo of dicot plants
|
|
0
|
2835
|
August 28, 2016
|
|
In the figure of a typical dicot embryo,label the parts 1,2 and 3.State the function of each of the labelled part
|
|
1
|
2575
|
August 28, 2016
|
|
Draw a labelled mature stage of a dicotyledonous embryo
|
|
0
|
1834
|
August 28, 2016
|
|
List the post-fertilisation events in angiosperms
|
|
0
|
4342
|
August 28, 2016
|
|
Explain any three advantages the seeds offer to angiosperms/
|
|
0
|
3825
|
August 28, 2016
|
|
Hybrid seeds have to be produced year after year
|
|
0
|
1757
|
August 28, 2016
|
|
Differentiate between albuminous and non-albuminous seeds, giving one example of each
|
|
0
|
3418
|
August 28, 2016
|
|
Mention the reasons for difference in ploidy of zygote and primary endosperm nucleus in an angiosperm
|
|
0
|
4112
|
August 28, 2016
|
|
How do plants produce seeds through apomixis?Explain with help of an example
|
|
0
|
2776
|
August 28, 2016
|
|
Some angiosperm seeds are said to be albminous,whereas few others are said to have a perisperm.Explain each with the help of an example
|
|
0
|
3228
|
August 28, 2016
|
|
Normally one embryo develops in one seed but when an orange seed is squeezed many embryos of different shapes and sizes are seen.Mention how it has happened
|
|
0
|
1570
|
August 28, 2016
|
|
In the following figure of a fruit,label the part that is protective in function and the part that is responsible for producing new plants
|
|
1
|
2388
|
August 28, 2016
|
|
Why is banana considered a good example for parthenocarpy?
|
|
0
|
1415
|
August 28, 2016
|
|
Mention the fate of the component of the embryo sac after fertilisation
|
|
0
|
4503
|
August 28, 2016
|
|
Draw a longitudinal section of a post-pollinated pistil showing entry of pollen tube into a mature embryo-sac
|
|
0
|
7063
|
August 27, 2016
|
|
(a)Mention any four strategies adopted by flowering plants to prevent self-pollination?
|
|
1
|
7041
|
August 27, 2016
|
|
1.Write the characteristic features of anther, pollen and stigma of wind pollinated flowers
|
|
1
|
3658
|
August 27, 2016
|