Topic 9: REPRODUCTION & DEVELOPMENT (Part 1)

Topic 9: REPRODUCTION & DEVELOPMENT

Multiple Choice

Reproductive ________________ : Flower involve in sexual reproduction in plants that shown in diagram above...

• Reproductive organ: Flower

• Reproductive structure: Flower

Multiple Select

Describe male reproductive organ in plants.

• The male reproductive organs in plant consist of (one or more) stamens / androecium.

• Male organ that are made up of anther and filament.

• Anther has pollen sac containing pollen.

• The anther is on a filament.

Multiple Select

Describe female reproductive organs in plants.

• The female reproductive organs in plant consist of pistil / carpel / gynoecium.

• Female organ consist of an ovary, style and stigma.

• An ovary contains one ovule.

• A style is a tubular structure that extends from the ovary.

• A stigma is sticky and located on top of the style.

PLANT GAMETOPHYTES

Compare between pollen grain and embryo sac of angiosperms.    

 [8 marks]

Multiple Choice

Similarities of plant gametophytes.

• Both are diploid reproductive structures

• Both are diploid gametophytes

• Both are produced through mitosis of haploid spores (n)

• Both are development of gametes

Multiple Select

Differences between pollen grain and embryo sac of angiosperms.

• Embryo sac: Develops in ovule / megasporangium whereas Pollen grain: Develops in pollen sac / anther / microsporangium

• Embryo sac: Megasporocyte / megaspore mother

  cell undergoes meiosis to produce

  megaspores whereas Pollen grain: Microsporocyte / microspore mother cell undergoes meiosis to produce microspores

• Embryo sac: Retained within the flower / ovary whereas Pollen grain: Released from the flower / anther

Multiple Select

Differences between pollen grain and embryo sac of angiosperms.

• Embryo sac: 8 nuclei in 8 cells are formed through mitosis

  without cytokinesis whereas Pollen grain: 2 nuclei are formed through mitosis with cytokinesis

• Embryo sac: Consists of seven cells / one egg cell, 3 antipodal cells, 2 synergids and 1

  central cell after cytokinesis whereas Pollen grain: Consists of two haploid cells / one tube cell / nucleus & one generative cell / nucleus