Study the given food web carefully. An increase in frog population is likely to cause_____.
1. Increase in the grasshopper population
2. Decrease in the lizard population
3. Increase in snake population
4. Decrease in hawk population
B2 and 4
C2 and 3
D1 and 3
Rahul wanted to find out how polluted water affects the survival of guppies. Which of the following set-ups should he use to conduct a fair test?
A a and b only
B b and c only
C a and d only
D c and d only
Please explain the answer.
Ram, a class 6 student observed different types of changes and tabulated them in the given table.
Which of the given observations are incorrect?
A1, 4 only
B2, 3 and 5 only
C2 and 3 only
D2 and 5 only
why answer should be B and not c
Which of the following observations confirms that an object is a magnet?
AThe object is attracted by a strong bar magnet.
BThe object causes a compass needle to move.
CThe object rotates before being attracted to a bar magnet.
DThe object is attracted to both poles of a horseshoe magnet.
why is n't answer B Right!
Given below are the differences between self pollination and cross pollination. Which one of them is incorrect ?
|Self pollination||Cross pollination|
|(A)||Pollen grains are transferred from anther to the stigma of the same flower||Pollen grains are transferred from anther to the stigma of another flower of a different plant|
|(B)||Occurs in bisexual flower having anther and stigma maturing at different times||Occurs in bisexual plants having anther and stigma maturing at same time|
|(C)||It takes place in plants like wheat,peas, soybean & peach.||It takes place in plants like lady finger,tomato, brinjal, apple & pear.|
|(D)||All of these.|
answer B is also write