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III. Very short answer type questions:                                                    9 X 1 =  9

21.  Name the chemicals that are used to remove weeds.

22. Write the name of bacteria that helps in the formation of curd.

23.  which cell does not have nucleus?

24. Name some artificial fibres

25.  Name the element present in coal

3 / 5

26.  What is the unit for expressing the calorific value of a fuel?

27. What is meant by atmospheric pressure?

28.Name the device which work on the principle of multiple reflection

29. which part of the cells contains organells please I mark you brainlest ​

Respuesta :

Kati19
21 weedicide
22 lactobacillus
23 prokaryotes
24 nylon, rayon, Dacron™, and Orlon™.
25 carbon hydrogen etc
26 kJ/kg
27 The atmospheric pressure is the weight exerted by the overhead atmosphere on a unit area of surface. It can be measured with a mercury barometer, consisting of a long glass tube full of mercury inverted over a pool of mercury
28 megaphone
29 organelles

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