Agamya Misra
from
Birla Balika Vidaypeeth, Pilani
Subject :Sam Class : Sample
Run-off pollution of a particular river resulted from overuse of chemical fertilizers by a nearby farm. Which of the following graphs correctly shows the resulting changes in levels of oxygen and bacteria in this river?
A
B
C
D
can someone please explain this
Ans 4:
Edit Post
Shreya Palkar
from
Podar International School, Buldana
Class : Class 9
I am totally Confused.Please make me clear my doubt. IIts a difficult question.
Ans 5:
Edit Post
chupapimunenya
from
Kairos International School, Hyderabad
Class : Class 9
yo dis shi hard af pls help. someone pls reply to my comment and explain pls