21.   That reasoning, historians say, illustrates a primitive form of deterrence.

22.   The anthrax and botulinum produced at one of their production plants were liquid, the most primitive form of biological weapons.

23.   The Red Planet may harbor a fossil record of how life arose and evolved in its most primitive forms.

24.   The shares can already be bought and sold on local stock exchanges in a primitive form of over-the-counter trading.

25.   There are programs that maneuver through the Internet guided by primitive forms of artificial intelligence, gathering information.

26.   They resemble some primitive form of television, wasting five irritating seconds or so now and then as you wend your way from one screen to another.

27.   It is believed to have lived in the early Jurassic era, usually associated with more primitive forms of carnivorous dinosaurs.

28.   MTNL counsel Dipanker Gupta contended that its existing service was a primitive form of cellular service.

29.   New evidence found in Australia suggests that primitive forms of life existed a billion years earlier than thought.

30.   Others have suggested it may be a primitive form of population control, perhaps imposed by slave owners who did not want their women unable to work.