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________are a type of inexpensive digital camera that remains tethered to a computer and used for video conferencing, video chatting and live web broadcast.

[A] : Tail wagging dance is performed for short distances . It conveys both the distance and speed of the scout bees . [R] : Foraging bees keep touching the scout bees through dance to get the information mainly by olfactory stimulation .

A : Poultry farming has definite advantage over live-stock rearing R : Poultry birds are easy to raise, can be acclimatised to a wide range of climatic conditions, have short life span and are prolific breeders

A dominant, independent, photosynthetic, thalloid or erect phase is represented by a haploid gametophyte and it alternates with the short-lived multicellular sporophyte totally or partially dependent on the gametophyte for its anchorage and nutrition. This type of pattern is present in

(a) How many million year ago, gigantic reptiles used to dominate on earth ? Give their common name and also mention the period and year in which they were predominanat on earth. (b) Why did these gigantic reptiles disappear from the earth in a short duration ? (c ) Name the most advanced living reptiles. List atleast two characters in which they resemble in mammals.

A short living plant in called.

Diploid ( sporophytic ) phase is more prominent and long lived and haploid ( gametophytic ) phase is short lived .