National Science Olympiad Forum By SOF Olympiad Trainer - Page 665

User Forum

Subject :NSO    Class : Class 4

Ans 1: (Master Answer)

Class : Class 1
The correct answer is D.

Post Your Answer

Subject :NSO    Class : Class 5

The given graph shows the changes in the population of an insect found on a Jackfruit tree after four different sprayings of the same insecticide.

What conclusion can you draw from the graph?

A The insecticide had no effect on the insects at all.
B The insect population had become resistant to the insecticide.
C The insect population increased as the wrong type of insecticide was used.
D The insecticide helped to reduce the number of insects permanently.


Ans 1:

Class : Class 5
Answer is B akenis withis ve

Ans 2:

Class : Class 7
D cannot be correct because it increased after 3rd and 4th spray

Ans 3:

Class : Class 5
wrong

Ans 4:

Class : Class 4

Ans 5:

Class : Class 4
answer is b only because it is decreasing also

Ans 6:

Class : Class 5

Ans 7:

Class : Class 5
IF B IS ANSWER THAN GRAPH SHOULD BE ALMOST UNIFORM.. THE GROWTH IS INCREASING AFTER 3RD-4TH SPRAYING

Ans 8:

Class : Class 5
it is supposed to be D. the graph should be going down slowly and not increasing if the answer was B.

Ans 9:

Class : Class 10
It is C because after the guy used the 3rd and 4th pesticide the insects started increasing

Ans 10: (Master Answer)

Class : Class 1

Ans 11:

Class : Class 8
The pesticide is partially effective because there is a drop in population after each spraying. Hence, B CANNOT BE THE CORRECT ANSWER.

Ans 12:

Class : Class 7
C

Ans 13:

Class : Class 8
it is d.sof posted wrong answer

Ans 14:

Class : Class 7
it should be 'D' but SOF shows the graph is decreasing and increasing which is not possible. it is the wrong graph as this can't happen.

Ans 15:

Class : Class 4
b

Ans 16:

Class : Class 9
If b is the answer then why is the bar graph increasing day by day.😠

Ans 17:

Class : Class 7
I think the right answer should be C as when the 3rd spray was conducted the pest started to increase hence right answer answer is CThank you for appreciating me

Ans 18:

Class : Class 6
D

Ans 19:

Class : Class 7
B is answer because when it decreases it is their natural death, otherwise they have become resistant thats why it is decreasing then increasing and not uniform.

Post Your Answer

Subject :NSO    Class : Class 5

Ans 1:

Class : Class 4

Ans 2:

Class : Class 4

Ans 3:

Class : Class 5

Ans 4:

Class : Class 7

Ans 5:

Class : Class 8

Ans 6:

Class : Class 8
(B) or (C)?

Ans 7:

Class : Class 7
It is "B". People who put "a" mixed up x

Ans 8:

Class : Class 6

Ans 9:

Class : Class 7

Ans 10:

Class : Class 5
A

Ans 11:

Class : Class 9

Ans 12:

Class : Class 7
B is the answer to this question

Ans 13:

Class : Class 8

Ans 14:

Class : Class 3

Ans 15:

Class : Class 10
A

Ans 16:

Class : Class 5
ANS B!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

Ans 17:

Class : Class 7

Ans 18:

Class : Class 6
Confusion between (B) and (C)

Ans 19:

Class : Class 5

Ans 20:

Class : Class 8

Ans 21:

Class : Class 5

Post Your Answer

Subject :NSO    Class : Class 1

Ans 1:

Class : Class 10
C

Post Your Answer

Subject :NSO    Class : Class 7

Ans 1:

Class : Class 7
I got the answer ........Its option (C) SPLEEN

Post Your Answer

Subject :NSO    Class : Class 1

Ans 1:

Class : Class 6
manit d is the answer

Post Your Answer

Subject :NSO    Class : Class 7

Ans 1:

Class : Class 8
Options B and D are correct

Post Your Answer

Subject :NSO    Class : Class 5

Ans 1:

Class : Class 10
D

Ans 2:

Class : Class 5
it is C as it is a Xanthium

Ans 3:

Class : Class 9
I think that laksmi is saying correct because we cannot diffrentiate them as it is not clear that they are spines like in xanthium or feather like in dandelion

Ans 4:

Class : Class 8
The Xanthium IS dispersed by animals

Ans 5:

Class : Class 6
It is Xanthium which is dispersed by animals.

Ans 6:

Class : Class 8
The correct option is (C) or (B)?

Ans 7:

Class : Class 5

Ans 8:

Class : Class 6
The picture given did not look like xanthium neither dandelion ,so it looked like dandelion to me so I went with (B)Please give better images

Ans 9:

Class : Class 5
how is this possible

Ans 10:

Class : Class 5
The image looks nothing like cocklebur. It has to be a bit more clear,

Ans 11:

Class : Class 6
The correct answer should be B because it has a hairy structure and it can be dispersed by wind .nor its written that this is Xanthium

Ans 12:

Class : Class 6
the damn picture needs to be clear

Ans 13:

Class : Class 8
it is dandelion isn't it??? i think it is wind because hair and size

Ans 14:

Class : Class 8

Ans 15:

Class : Class 8
even I went with B

Ans 16:

Class : Class 9
Its B

Ans 17:

Class : Class 4
The picture is not clear and it cannot be said that it is a xanthium neither can it be said it is a dandelion. I went with B. Please show better qualities pictures sof.

Ans 18:

Class : Class 8
Can't understand

Ans 19:

Class : Class 5
Correct answer is A !!! As it is having hair like structure so, it is carried by wind

Ans 20:

Class : Class 9
it has hair like structure

Ans 21:

Class : Class 10
You are correct ans. is B wind because it seems to be light in weight and also hairs that acts like feathers and also wind can carry only light weight seeds.

Post Your Answer

Subject :NSO    Class : Class 5

Ans 1:

Class : Class 7
IT IS IN 1984 WHEN MY MOTHER WAS BORN.

Ans 2:

Class : Class 5
I HAD CONFUSION WITH A AND C

Ans 3:

Class : Class 5
ans is a April 3 1984 not ans c

Ans 4:

Class : Class 10
Answer is A April 3, 1984

Ans 5:

Class : Class 7
IT IS JUST ON MY BIRTHDAY SO I REMEMBER IT. OPTION C IS THE ANSWER

Ans 6:

Class : Class 8
(A) is the correct answer

Ans 7:

Class : Class 5

Ans 8:

Class : Class 8
Hey, mathamagician. Uh it could also be April 3 since the dates might differ by a few days due to there being many sources.

Ans 9:

Class : Class 6
No, it is actually none, it was on 2nd April 1984.

Ans 10:

Class : Class 10

Ans 11:

Class : Class 7
A is the answer to this question

Ans 12:

Class : Class 10

Ans 13:

Class : Class 8
the answer is 2nd april 1984 i got confused

Post Your Answer

Subject :NSO    Class : Class 3

Ans 1:

Class : Class 5
(A) Nomads

Ans 2:

Class : Class 7
(D) IS THE ANSWER

Post Your Answer