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Agril Entomology-8

Q.1
The Stability of ecosystem is maintained by_________.

Homeostasis
Diversity of Species
Food web


Q.2
The factors, the favours, the implementations of IPM in the country at the farm level are_________.
Crop diversity
Intercropping
Both


Q.3
In population ecology, the density dependent environmental factors have been described imperfect by________.
Andrewartha & Birch
Milne
Pimentel


Q.4
The major theoretical contributions of population ecology can be considered in___________.
Two groups
Four groups
Five groups


Q.5
Detailed ecological studies ( including life- table studies) , extended over pre-reguisite for forecasting of _______.
Regular pests
Sporadic pests
Potential pests


Q.6
The two approaches employed for the study of ecosystem are________.
Physical and biological
Hological and Merological
Autecological and Synecology

Q.7
Organisms that are adapted to a wider range of temperature tolerance are termed as_________.

Stenothermal
Eurythermal
Polythermal


Q.8
In ecology , the “ Low of tolerance “ was given by________.
Leibig (1840)
Penmal (1956)
Shelford


Q.9
Population ecology and population genetics are often considered together, termed as__________.
Community ecology
Population ecology
Evolutionary ecology


Q.10
The only method of making direct quantitative measurements of the undisturbed flight behavior of insect at an attitude is though________.
Visual observation
Video techniques
Entomological radars


Q.11
Under ideal condition to increase in the population is_______.
Sigmoidal
Constant rate
Exponential


Q.12
Insect which are able to survive over wide range of effective temperature_______.
Stenothermic
Homeostasis
Eurythermic


Q.13
When a substances becomes concentrated instead of being dispersed with each link of food chain, the phenomenon is called as_________.
Saturation
Biomagnification
Food web


Q.14
In life tables type I curve shows_______.
Law death rate of young
High mortality in old
Both


Q.15
The place where an organism live is known as_________.
Food chain
Niche
Habitat


Q.16
Fundamentals of ecology “ was written by_________.
S.P.Singh
E.P.Odum
A.S.Atwal


Q.17
The chief mechanism for moving nitrogen from air reservoir into productivity cycle is_______.
Manuring
Rain
Biological fixation


Q.18
A measure of the innate ability of a population to survive and reproduce is called as_____________.
Carrying capacity
Biotype
Biotic potential


Q.19
When insects remain in dormant stage due to temperatures lower then the optimum, they are said to have undergone_________.
Hibernation
Aestivation
Quiscence


Q.20
When insects remain in dormant stage due to temperatures higher then the optimum, they are said to have undergone_________.
Hibernation
Aestivation
Quiscence


Q.21
All living organisms on earth interacting with physical environment as a whole are referred to as the________.
Biosphere
Biome
Ecosystem


Q.22
A specific strain of a species adapted to a particular set of environmental conditions_____________.
Biotype
Ecotype
Allotype


Q.23
The rate of death and expectation of life at various time intervals during the life span of an insect are indicated by________.
Density
Natality
Life table


Q.24
The specific position of a specific within a community including utilization of resources both in qualitative and quantitative terms is referred to as_______.
Niche
Habitat
Biome


Q.25
Study of associations of organisms in relation to a particular area or habitat is__________.
Synecology
Autecology
Bioecology

Number of score out of 25 = Score in percentage =

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