Post fertilization changes in plants are given, By observing the given pair complete the others.
a) Zygote : Embryo
b) Ovule : ……….
c) Ovary : ……….
d) Nucellus: Perisperm
e)Integuments : ……….
f) PEN : ……….

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.

In the anatomy lab. Eugin observed the following features in the T.S of a plant part. a) Radial and polyarch xylem bundles b) Parenchymatous (homogenous) cortex c) Large pith d) Epidermis with unicellular hairs e) Pericycle f) Endodermis with casparian strips. i) Identify the plant part. ii) Re-arrange the given regions from the periph-ery to the center in their correct sequence. iii) Give an account of casparian strips.

Some statements related to cabon monoxide and carbon dioxide are given. Classify them accordingly. a) Formed as a result of incomplete combustion of carbon compounds. b) Aqueous solutions shows acidic nature. c) Poisonous gas d) Used in fire extinguishers. e) Can be used as fuel f) Formed as a result of complete combustion of carbon compounds. g) can be prepared from carbonates and bicarbonates. h) is a component of producer gas and water gas.