Organisms remain as individuals but interact as a group with other organisms and physical habitats and behave as population, community, ecosystem, etc.
(a) What according to you, are the factors that account for the formation of major biomes?
(b) Name any four major biomes of India.
(c) What value is learnt from this statement?

Water is the most important factor influencing the life of organisms.  Life on earth originated in water and cannot be sustained without water.  Organisms living in water bodies (ocean, lake, river, etc.) also face water-related problems.
(a) How are aquatic animals affected by the quality of water? Explain.
(b) Mention any four adaptations the desert plants have, to live there successfully.
(c) Represent the value learnt.

Himani while watching a TV programme based on life in polar region observed that all animals in polar regions possess larger size. Also, smaller animals are not found in that region. She asked about this surprising fact to her teacher.
(i) why smaller animals (e.g. humming birds) are rarely found in polar regions?
(ii) What are the adaptations shown by polar animals?
(iii) What are the chief characteristics of polar region animals?
(iv) What values are shown by Himani?

A group of students visited a botanical garden, where they saw fungus growing on roots of higher plants only. They were confused seeing it then, their teacher told them that it is an interspecific interaction in which both species can be benefitted.
(i) Write the name of this particular association
(ii) How both are benefitted from each other?
(iii) State use of this interaction to a farmer
(iv) What values are shown by students

Ramesh went to an excursion trip to Kumaun hills, along with his classmates, under an escort teacher. On reaching the destination, he all of a sudden started feeling nausea, heart pulpitation and fatigued. One of his friends and a classmate suggested him to take rest for some time.
Answer the following questions on the basis of above information::
(i) Suggest the reason of his not feeling well suddenly
(ii) Why did his friend advise him to take rest for some time?
(iii) What values were exhibited by his friend?