Biology - Ecology and Environment
Exam Duration: 45 Mins Total Questions : 30
The term 'ecosystem' was coined by
- (a)
Odum
- (b)
Reiter
- (c)
Ernst Haeckel
- (d)
Tansley
Lichens are association of
- (a)
bacteria and fungus
- (b)
algae and bacterium
- (c)
fungus and algae
- (d)
fungus and virus
Mass of living matter at a trophic level in an area at any time is called
- (a)
detritus
- (b)
humus
- (c)
standing state
- (d)
standing crop
Which of the ecological pyramid is always upright?
- (a)
Pyramid of number
- (b)
Pyramid of biomass
- (c)
Pyramid of energy
- (d)
None of above
The relationship between a parasite and host is
- (a)
Good for neither
- (b)
Good for one and harmful for the other
- (c)
Mutually beneficial
- (d)
Useful for the host
The nausea, fatigue and heart palpitations are the symptoms of
- (a)
Sea sickness
- (b)
Deep sea sickness
- (c)
Altitude sickness
- (d)
Desert sickness
The pyramid of biomass indicates
- (a)
total number of individual in a food web.
- (b)
total number of organic material in food web.
- (c)
total weight of animals and plants on earth.
- (d)
none of these.
Biodiversity means
- (a)
the increase in a particular species
- (b)
the occurrence of many species at a time
- (c)
the existence of many species in a particular area at a given time
- (d)
the evenness of species in the world
Match the percentage of extinction with animals
Column 1 | Column 2 |
(1) Gymnosperms | a.23% |
(2) Bird species | b.32% |
(3) Amphibians. | c.31% |
(4) Mammals | d.12% |
- (a)
1 2 3 4 d c b a - (b)
1 2 3 4 c d b a - (c)
1 2 3 4 c d a b - (d)
1 2 3 4 d a b c
Sanctuaries, national parks and biosphere reserves are the examples for
- (a)
Hot spots
- (b)
Endemic areas.
- (c)
Protected areas
- (d)
Sacred areas
Which one of the following is not included under in situ conservation?
- (a)
Sanctuary
- (b)
Botanical gardens
- (c)
Biosphere reserve
- (d)
National park
The principle of competitive exclusion was stated by
- (a)
C Darwin
- (b)
GF Gause
- (c)
MacArthur
- (d)
Verhulst and Pearl
Which one of the following is one of the characteristics of a biological community?
- (a)
Stratification
- (b)
Natality
- (c)
Mortality
- (d)
Sex-ratio
Which part of the world has high density of organisms?
- (a)
Deciduous forests
- (b)
Grasslands
- (c)
Savannas
- (d)
Tropical rain forests
Diffuse porous woods are characteristic of plants growing in
- (a)
temperate climate
- (b)
tropics
- (c)
alpine region
- (d)
cold winter regions
Warm ocean surge of the Peru current recurring every 5 to 8 year or so in the East Pacific of South America is widely known as
- (a)
Magnox
- (b)
Gull stream
- (c)
EI Nino
- (d)
Aye Aye
Organisms that can tolerate a wide range of salt concentration are termed as
- (a)
stenosaline
- (b)
stenohaline
- (c)
euryhaline
- (d)
eurysaline
___________ is the exploration of molecular, genetic and species-level diversity for gaining the products of economic importance.
- (a)
Exploitation
- (b)
Bioprospecting
- (c)
Co-extinction
- (d)
Patenting
Most successful parasites are those which do not
- (a)
Grow free
- (b)
Kill their host
- (c)
Reproduce sexually
- (d)
Survive in soil
In an ecosystem:
- (a)
Primary producers are more than primary consumers
- (b)
Primary consumers are large than primary producers
- (c)
Secondary consumers are larger than primary producers
- (d)
Primary consumers are least depend on primary producers
Which one is omivorous -
- (a)
Frog
- (b)
Lion
- (c)
Deer
- (d)
Man
Which biotic components mainly help in recycling of minerals -
- (a)
Producers
- (b)
Consumers
- (c)
Decomposers
- (d)
All the above
The Pyramid of numbers in grassland ecosystem will be -
- (a)
Up right
- (b)
Inverted
- (c)
Irregular
- (d)
Linear
Gross primary productivity is -
- (a)
Rate at which organic molecules are formed in autotroph
- (b)
Rate at which organic molecules are used up by an autotroph
- (c)
Storage of organic molecules in the body of an autotroph
- (d)
Rate at which organic molcules are transfered to next higher tropic level
Choose odd one out w.r.t. structure of ecosystem
- (a)
species diversity
- (b)
Productivity
- (c)
Species
- (d)
Stratification
Number of red list categories prepared by WCU (IUCN) is
- (a)
6
- (b)
7
- (c)
8
- (d)
12
Which is not a criteria used for determining hot spots?
- (a)
Number of endemic species
- (b)
Degree of habitat destruction
- (c)
Having traditional strategy for protection of biodiversity
- (d)
Degree of exploitation
Which is the National Aquatic Animal of India?
- (a)
Sea-horse
- (b)
Gangetic Shark
- (c)
River Dolphin
- (d)
Blue Whale
During decomposition, humification leads to accumulation of a dark coloured amorphous substance called humus. Which of the following is correct regarding humus?
- (a)
Susceptible to microbial action
- (b)
Undergoes decomposition at an extremely high rate
- (c)
Colloidal in nature
- (d)
It promote compaction of soil
Most animals that live in deep oceanic waters are:
- (a)
Detritivores
- (b)
Primary consumers
- (c)
Secondary consumers
- (d)
Tertiary consumers