If we live in the plains and suddenly go to high mountain regions, we may experience difficulty in breathing and doing physical exercise for some days.
However, after some days, our body adjusts to the changed environmental conditions on mountains. This is an example of ________.
The given diagram shows nitrogen cycle in the ecosystem. P, Q, R, S and T represent different chemical conversion steps in the cycle.
Which process (P - T) is correctly paired with the organism's group performing that step?
I. P is Nitrobacter
II. Q is bacteria symbiotic with plants
III. R is denitrifying bacteria
IV. S is nitrifying bacteria
V. T is nitrogen fixing bacteria, such as Rhizobium or cyanobacteria
AIII, IV and V
BIV and V
CI, III and IV
DIII and IV
Can somebody explain this diagram to me?
Which of the following is a correct match of the type of house with the area it is most commonly found in?
AIgloo - Kerala
BHouse on stilts - Madhya Pradesh
CHouseboat - Assam
DHouse with sloping roof - Kashmir
None of these slopping house found in hilly area
Which of the following is correct?
A Jaundice is not a communicable disease.
B Leprosy is a non-contagious disease of skin.
C Cholera spreads through contaminated air.
D Tetanus can occur due to entry of germs through cut skin.
Read the given passage with a mistake and select
the option that corrects it.
During the process of breathing (inhalation), the diaphragm muscles contract and be comes dome shaped. At the same time, intercostal muscles contract to pull the ribs upwards. This increases the volume of the chest cavity. Subsequently the volume of lungs increases. As the air pressure in the lungs decreases, air moves into the lungs through the air passage.
A The diaphragm muscles contract and become flat.
B This decreases the volume of the chest cavity.
C As the air pressure in the lungs increases, air moves into the lungs through the air passage.
D At the same time, intercostal muscles contract to pull the ribs downwards.
Which one of the following special characteristics of
animals does not help them to survive?
A Camels have long eyelashes to prevent sand from entering their eyes.
B Rhinoceroses keep their bodies cool by wallowing in mud.
C Desert foxes have large ears to help them lose heat easily.
D Kangaroo rats store fats in their humps which can be changed into water
Megha conducted an experiment to find out the requirements
for photosynthesis. She subjected the plants to different
conditions as shown in the table below. Study the table
and use it to answer the question.
Which of the following variables should be kept constant to conduct a fair test?
(i) Type of plant
(ii) Amount of soil
(iii) Size of pot
(iv) Type of soil
A i and ii only
B ii and iv only
C i, ii and iii only
D All of the above