Mention ploidy of the following :
(i) Zygote (ii ) Ovum (iii) Gemma of Marchantia (iv) Prothallus of ferns

Explain the following: (i) Smoke (ii) Fumes (iii) Dust (iv) Mist

Which of the following are compounds ? (i) Co (ii) NO(iii) NO(iv)CO

Mention one use each of the following drugs : (i) Ranitidine (ii) Paracetamol (iii) Tincture of iodine

Find : ( i ) (ii) (ii) (iii) (iii) (iv)

Mention the evolutionary significance of the following organisms : (i)Shrews (ii)Lobefins (iii)Homo habilis (iv)Homo erectus

List the most important feature of the following stages : (i) S-phase, (ii) Zygotene, (iii) Pachytene: (iv) Anaphase-I

Mention the ploidy of the following: protonemal cell of a moss, primary endosperm nucleus in dicot, leaf cell of a moss, prothallus cell of a fern, gemma cell in Marchantia, meristem cell of monocot, ovum of a liverwort, and zygote of a fern.

Arrange the formation of the following cells in the ovary the sequential order : i) Ovum ii) Primary follicle iii) Primary oocytes iv) Graffian follicle

(a) Draw a diagram of the structure of a human ovum surrounded by corona radiata. Label the following parts : (i) Ovum, (ii) Plasma Membrane, (iii) Zona Pellucida (b) State the function of Zona Pellucida.