Benthic organisms are found in
surface of marine water
middle of water in sea
bottom of sea
on ground
C.
bottom of sea
Organisms confined to bottom of the sea are called benthos and the habitat in which they live is called benthic.
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
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) |
The direction of energy flow is
Producers → Herbivores → Decomposers → Omnivores
Producers → Carnivore → Herbivores → Decomposes
Decomposers → Carnivores → Herbivores → Producers
Producers → Herbivores → Carnivores → Decomposers
Natality refers to
Death rate
Birth Rate
Number of individuals entering a habitat
Number of individuals leaving the habitat
Stability of ecosystem depends upon
Primary productivity
Interchange between producers and consumers
Number of producers
Number of consumers
