What do you understand by observing the choice box experiment conducted by your teacher ?
A) Behaviour of cockroaches
B) Selection of their pair in cockroaches
C) Food habits of cockroaches
D) None of the above
1 Answers
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There are two boxes, red and white in colour. The ratio of the number of chocolates in the white box to the number of biscuits in the red box is ` 3 :
Correct Answer - ` 18 : 13`
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In a box, there are 20 marbles. Each marble is marked with a distinct number from 1 to 20. Find the probability of drawing a marble from the box which
Correct Answer - `1//5`
2 Answers 1 views
(i) The base of an open rectangular box is square and its volume is ` 256 cm^(3)`. Find the dimensions of this box if we want to use least material fo
Correct Answer - (i) 8 cm, 8 cm, 4 cm (ii) Length = `80/(pi+4)" metre, Breadth "40/(pi+4)" metre,Radius "40/(pi+4)` metre
2 Answers 1 views
There is a box containing 30 bulbs of which 5 are defective. If two bulbs are chosen at random from the box in succession without replacing the first,
Correct Answer - `2/87`
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(i) A box contins 80 discs, which are numbered from 1 to 80. If one disc is drawn at random from the box, find the probability that it bears a perfect
Correct Answer - ` (i) 1/10 (ii) (a) 9/10 (b) 1/5`
2 Answers 1 views
The following are used for observing chloroplast in your lab : a) Rheoleaf b) Slide c) Microscope
D) a, b, c only
2 Answers 1 views
In the choice box experiment the cockroach prefers …………………. conditions. i) Dark conditions ii) Light conditions
Correct option is B) i and iv
2 Answers 1 views
The indicators M1 & M2 that are marked on the glass tube in the experiment conducted on root pressure explain
(D) Level of water
2 Answers 1 views
You have prepared a work sheet for collecting information on observing different food chains.
B) Food relationship
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Your computer teacher asked you to explain the project work done by your group. Which package will help you to do so?
Power Point.
2 Answers 1 views