Question 1

The pyramid of energy in any ecosystem is

Accepted Answer

A)  Always upright
B)  May be upright or invented
C)  Always inverted
D)  None of the above A

Question 2

Biotic potential is counteracted by

Accepted Answer

A)  Competition with other organisms
B)  Producer is the largest
C)  Limitation of food supply
D)  None of the above D

Question 3

MAB stands for

Accepted Answer

A)  Man and biosphere
B)  Man, antibiotics and bacteria
C)  Man and biotic community
D)  Mayer, Anderson and Bisby A

Question 4

An ecosystem must have continuous external source of

Accepted Answer

A)  minerals
B)  energy
C)  food
D)  All of the above

Question 5

Energy flow in ecosystem is

Accepted Answer

A)  Unidirectional
B)  Bidirectional
C)  Multidirectional
D)  None of the above

Question 6

In a food chain of grassland ecosystem the top consumers are

Accepted Answer

A)  Herbivorous
B)  Carnivorous
C)  Bacteria
D)  Either carnivorous or herbivorous

Question 7

A high density of elephant population in an area can result in

Accepted Answer

A)  mutualism
B)  Intraspecific competition
C)  Interspecific competition
D)  Predation on one another

Question 8

Symbiosis is shown by

Accepted Answer

A)  E.coli
B)  Cuscuta
C)  Rafflesia
D)  Monotropa

Question 9

Synecology deals with

Accepted Answer

A)  Ecology of many species
B)  Ecology of many populations
C)  Ecology of community
D)  None of the above

Question 10

The term 'Biocoenosis' was proposed by

Accepted Answer

A)  Transley
B)  Carl Mobius
C)  Warming
D)  None of the above

Question 11

When both partners are affected negatively the nature of interaction is

Accepted Answer

A)  commensalism
B)  competition
C)  predation
D)  amensalism

Question 12

Which of the following interactions will not promote co evolution?

Accepted Answer

A)  commensalism
B)  mutualism
C)  parasitism
D)  interspecific competition

Question 13

Ecotype is a type of species in which environmentally induced variations are

Accepted Answer

A)  Temporary
B)  Genetically fixed
C)  Genetically not related
D)  None of the above

Question 14

Which one is true?

Accepted Answer

A)  symbiosis when neither population affects each other
B)  symbiosis when the interaction is useful to both the populations
C)  commensalism when none of the interacting populations affect each other
D)  commensalism when the interaction is useful to both the populations

Question 15

An association between two individuals or populations where both are benefitted and where neither can survive without the other is

Accepted Answer

A)  competition
B)  commensalism
C)  mutualism
D)  protocoperation

Question 16

Species that occur in different geographical regions separated by special barrier are:

Accepted Answer

A)  Allopatric
B)  Sympatric
C)  Sibling
D)  None of the above

Question 17

Barnacles growing on the back of whale is an example for

Accepted Answer

A)  mutualism
B)  parasitism
C)  amensalism
D)  commensalism

Question 18

Definition of ecosystem is

Accepted Answer

A)  The community of organisms together with the environment in which they live
B)  The abiotic component of a habitat
C)  The part of the earth and its atmosphere which inhibits living organisms
D)  A community of organisms interacting with one another

Question 19

Pencillium does not swallow the growth of bacterium Staphylococcus. This sort of relationship is called

Accepted Answer

A)  commensalism
B)  predation
C)  amensalism
D)  mutualism

Question 20

The effect of interspecific competition on niches is to make them

Accepted Answer

A)  larger
B)  smaller
C)  more triangular
D)  change location

Exam 1: Ecology and Ecosystems: Understanding Interactions and Relationships