Match the column I with column II and select the correct option.
|Column I||Column II|
|(Causes of soil erosion)||(Methods of soil conservation)|
|a. Running water carries
the topsoil with it
|b. Strong winds blow away
|2. Wind breaks|
|c. Indiscriminate cutting of trees||3. Afforestation
4. Terrace farming
A a-1, 3; b-2; c-4
B a-2, 4; b-1; c-3
C a-2; b-1, 3; c-4
D a-1, 4; b-2; c-3
Priyanka took a destarched potted plant and set up an experiment as shown in the figure. She left the plant in sunlight for few hours and then tested the leaves X and Y for starch. Leaf X did not give starch test while leaf Y showed presence of starch.
What is proved by this experiment?
A Chlorophyll is necessary for photo-synthesis.
B Carbon dioxide is necessary for photo-synthesis.
C Light is necessary for photosynthesis.
D Oxygen is given out during photo-synthesis.
When a person faints, you should _____.
A Wrap him in a blanket
B Wrap his feet in ice pack
C Tie a bandage around his head
D None of these
What should you do?
Which of the following pairs are correctly matched?
(i) Protoplasm – Purkinje
(ii) Discovery of cell – Leeuwenhoek
(iii) Cell theory – Schwann
(iv) Omnis cellula-e-cellula – Virchow
(v) Nucleolus – Robert Brown
A (i), (iii) and (iv) only
B (i), (iii), (iv) and (v) only
C (i), (ii) and (iv) only
D (ii), (iv) and (v) only
felice fontana discovered nucleolus