Animals are categorized into viviparous and oviparous based on the development of the Zygote takes place outside the body or inside. In which of these two types the chances of survival is greater. Why?

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.

Animals in which development of zygote takes place outside the body of female parent and they lay fertilised/unfertilised eggs are called

Animals in which development of zygote takes place inside the body of female parent, i.e., they give birth to young ones are called

Why are offspring of oviparous animals at a greater risk as compared to offspring of viviparous animals?

Read the following statements and find out the incorrect statements. a. Each testicular lobule contains one to three highly coiled seminiferous tubules in which sperm are produced b. Each seminiferous tubule is lined on its inside by two types of cells called Leydig cells and Sertoli cells. c. The region outside the seminiferous tubules called interstitial space, contain small blood vessels and male germ cells (spermatogonia) which lead to sperm formation. d. In testis immunologically component cells are also present. e. The seminiferous tubules of the testis open into the rete testis through vasa efferentia.

The chances of survival of young ones is greater in viviparous organisms than oviparous organisms. Justify this statement.

Based on the refining of copper two chemical equations are given below. a) Cu^2+ 2e^- rarr Cu b) Cu rarr Cu^2+ 2e^- Write the chemical reaction taking place at anode? ii) in which electrode pure copper is precipitated?