Which of the following statements are correct?
(i) Venus is believed to have active volcanoes.
(ii) Mars has the biggest crater in the solar system.
(iii) The first seismograph was made in Germany.
(iv) Many dormant volcanoes are found around the Pacific ocean, giving rise to the name 'Pacific Ring of Fire'.
A (ii) and (iv)
B (i) and (ii)
C (i) and (iii)
D (iii) and (iv)
While swimming under-water, Ashok found that he cannot see very clearly even in absolutely clear water. This is due to
A absorption of light in water.
B scattering of light in water.
C reduction of speed of light in water.
D change in the focal length of eye lens.
The plant shown in the figure will eventually die due to a lack of ________
What would happen if snake is completely removed from the given food chain?
Grass → Grasshopper → Frog → Snake → Peacock
a. Frog population will increase.
b. Grasshopper population will increase.
c. Peacock population will increase.
d. Peacock population will decline.
Ab and d
Ba and b
Cb and c
Da and c
how peacock population will increase when its food snake is removed from food chain?
Your were given a collection of bacteria and asked to distinguish them as Gram +ve and Gram –ve. The following flow chart represents the procedure of Gram staining. What are likely to be in sol. 1, sol. 2 and sol. 3?
ACrystal violet, alcohol, Janus green
BCrystal violet, iodine solution, alcohol + water
CCrystal violet, water, alcohol
DCrystal violet, water, iodine solution
If '+' means '-', '-' means '×', '×' means '÷', and '÷'
means '+', then find the value of
14 × 3 ÷ 11 - 3 + 101?
Read the following statements made by two students.
Shuchi : There are three stages in its life cycle. The young one is very similar to its parent. It is P.
Ritu : There are four stages in its life cycle. The young one is very different from its parent. It is Q.
Identify the correct option with regard to P and Q.
A Housefly --------Cockroach
B Butterfly --------Grasshopper
C Cockroach ------Housefly
D Cockroach ------Grasshopper