The percolation property of soil is controlled by which of the following parameters?
Composition and Aggregation
Composition and pH
Composition, Aggregation, and grain size
Grain size, topography, and pH
Host-specific parasites show which ecological phenomenon
Co-evolve
Competition
Predation
Mutualism
Parasites often have one or two intermediate hosts or vectors
To make a life cycle more complicated
To facilitate parasitization of its primary host
To cause advanced life cycle
To infect a broad range of organisms
Under a particular set of selection pressures, organisms evolve towards the most efficient:
Thermoregulation
Water conservation
Respiration
Reproduction strategy
The human liver fluke
A trematode parasite
Depends on two intermediate hosts- snail and Dog
Both 1 and 2
Simple life cycle
A population interaction where one species is harmed whereas the other is unaffected is called as:
Amensalism
When certain exotic species are introduced into a geographical area they become invasive mainly because:
The invaded land has unlimited resources for the introduced species
The invaded land does not have its natural predator
The population of the introduced species in the invaded land is very low
Introduced species do not face any competition in the introduced land
Homeostasis is
tendency to change with change in environment
tendency to resist change
3 disturbance in regulatory control
plants and animals extracts used in homeopathy
Identify the biome that is not correctly matched with the physical parameters given in corresponding Column II and Column III:
The most ecologically relevant environmental factor is:
Temperature
Water
Light
Soil
If global warming continues, how would the distributional range of some species be affected?
There will be a poleward shift
There will be an equatorial shift
No change expected for any species
Shift to marine water from land
Many freshwater animals cannot live for long in sea water and vice versa because of:
Buoyancy related problems
Lack of impermeable skins
Thermolabile enzymes
Osmotic considerations
Under unfavorable conditions, many zooplankton species in lakes and ponds are known to enter a stage of suspended development called as:
Dormancy
Hibernation
Aestivation
Diapause
The given age pyramid represents a:
Fast expanding population
Slowly expanding population
Stable population
Declining population
Darwinian fitness is represented by:
Low r value
High r value
High K value
Low K value
In a field experiment, when all Pisaster starfish were removed from an enclosed intertidal area, the result was:
Increase in diversity of invertebrates
Extinction of many invertebrate species
Inability of the Pisaster to enter the area again
Replacement of Pisaster by other starfish
A species whose distribution is restricted to a small geographical area because of the presence of a competitively superior species is found to expand its distributional range dramatically when the competing species is experimentally removed. This is called:
Competitive Exclusion
Competitive Release
Competitive Supremacy
Competitive Inclusion
Which of the following is not an ectoparasite?
Lice on humans
Copepods on marine fishes
Mistletoe on other plants
Female Anopheles on humans
To get pollinated by a bee, the Mediterranean Orchid, Ophrys, employs:
Sexual deceit
Pseudo-copulation
Reward in the form of Nectar
Place for laying eggs
While heat gain or heat loss is the function of ______, heat production is the function of ________ of the body of an animal.
Volume; Surface area
Surface area; Volume
Volume; Volume
Surface area; Surface area
In the logistic growth equation given below, the carrying capacity is represented by:
dN/dT = rN(K-N)/K
N
r
K
K-N/K
The plant Cuscuta is a:
Partial root parasite
Which one of the following are important biotic factors that can affect the structure and organization of biological communities?
Temperature and rainfall
Nutrient availability and soil pH
Predation and competition
Light intensity and seasonality
In a tide pool, 15 species of invertebrates were reduced to 8 after one species was removed. The removed species may be a:
Parasite
Mutualist
Top predator
Herbivore
Which of the following is the breeding place for Flamingoes in India?
If global warming continues, in general, how what would be the expected effect on the distributional range of some species ?
The logistic growth curve of animal population growth is more realistic than J shaped curve because:
Asexual mode of reproduction is rare in higher animals
Resources are finite and become limiting sooner or later.
Most animals are conformers rather than regulators
Abiotic factors affect animals more than plants
Which of the following is not a function of predators?
They act as conduits for energy transfer across trophic levels
They keep prey populations under control
They help in the stabilization of the ecosystems
They decrease the species diversity in a community
Very small animals are rarely found in polar region mainly because:
Smaller animals have a relatively slower heart rate
Smaller animals have a more surface area relative to their volume
Smaller animals are invariably herbivores
Smaller animals rely on diffusion for exchange of gases with the environment
When the population density reaches the carrying capacity, the logistic growth curve is said to be in:
Lag phase
A phase of acceleration
A phase of deceleration
Asymptote
Please disable the adBlock and continue. Thank you.
