CBSE
Multiple Choice QuestionsThe direction of energy flow is
Producers → Herbivores → Decomposers → Omnivores
Producers → Carnivore → Herbivores → Decomposes
Decomposers → Carnivores → Herbivores → Producers
Producers → Herbivores → Carnivores → Decomposers
Which important green-house gas, other than carbon dioxide, is being produced from the agricultural fields?
Arsine
Sulphur dioxide
Ammonia
Nitrous oxide
If the Bengal tiger become extinct
Hyenas and wolves will become scarce
Its gene pool will be lost forever
The wild areas will be safe for man and domestic
The population of beautiful animals like deer will get stabilised
Ten percent law of energy transfer in a food chain is given by
Schimper
Elton
Haeckel
Lindemann
Natality refers to
Death rate
Birth Rate
Number of individuals entering a habitat
Number of individuals leaving the habitat
Match the items given in Column I with those in Column II and select the correct option given below:
| Column I | Column II | ||
| a | Herbarium | i | It is a place having a collection of preserved plants and animals |
| b | Key | ii | A list that enumerates methodically all the species found in an area with brief description aiding identification |
| c | Museum | iii | Is a place where dried and pressed plant specimens mounted on sheets are kept |
| d | Catalogue | iv | A booklet containing a list of characters and their alternates which are helpful in identification of various taxa. |
| a | b | c | d |
| (i) | (iv) | (iii) | (ii) |
| a | b | c | d |
| (iii) | (ii) | (i) | (iv) |
| a | b | c | d |
| (iii) | (iv) | (i) | (ii) |
| a | b | c | d |
| (ii) | (iv) | (iii) | (i) |
Overlapping region between two ecosystems is called
Biome
Ecotone
Niche
Photic zone
The term 'aquaculture means
Aspergillosis
Inland fisheries
Marine fisheries
Both (b) and (c)
Benthic organisms are found in
surface of marine water
middle of water in sea
bottom of sea
on ground
Stability of ecosystem depends upon
Primary productivity
Interchange between producers and consumers
Number of producers
Number of consumers
