Categorize the following into pre and post fertilization changes in plants.
Gamete transfer,pericarp formation, ovule development, embryogenesis.

Assertion: All the events of sexual reproduction prior to the fusion of gametes includes in the post-fertilisation events. Reason: Pre-fertilisation event includes gametogenesis and embryogenesis.

Assertion: The events of the sexual reproduction though elaborate and complex, follow a regular sequence. Reason: Sexual reproduction is characterised by the fusion (or fertilisation) of the male and female gametes, the formation of zygote and embryogenesis.

Categorize the following under the heads of events of sexual reproduction (Embryogenesis, gametogenesis, syngamy, gamete transfer, zygote)

Events of sexual reproduction is given below. Write the events in a sequential order. Fertilization, gamete transfer, zygote,gametogenesis,embryogenesis.

Read the following statements carefully and select the appropriate option given below. (i) Bisexual animals that possess both male and female reproductive organs, are hermaphrodites. (ii) In seed plants, pollen grains are the carriers of male gametes and ovule have the egg. (iii) Events in sexual reproduction before the formation of zygote are called post-fertilisation events. (iv) Sexual reproduction involves the formation and fusion of gametes, (v) Animals are categorised into oviparous and viviparous based on whether the development of the zygote takes place outside the body of the female parent or inside.

Write technical terms for the following. a) Morphologically different types of gametes. b) Process of formation of male and female gametes. c) Formation of new organisms without fertilization.

Read the following statements and find out the incorrect statements. a. In majority of organisms, male gamete is motile and female gamete is non-motile (stationary). b. In algae and fungi, both male and female gametes are non-motile. c. In seed plants, pollen grains are the carrier of male gametes and ovule has the egg. d. In dioecious plants, pollination facilitates transfer of pollen grains to the stigma. e. In monoecious animals, since male and female gametes are formed in different individuals, the or ganism must evolve special mechanism for gamete transfer.

The diagram given below shows the transverse section of a young anther. Identify the parts a,b,c and d. (b) The developmental stages of male gametes in plants consist of microsporogenesis and male gametophyte. Arrange the following terms in their correct development sequence. Pollen grain Sporogenous tissue Anther Microspore tetrad Pollen mother cell Male gamete