EASY
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Name the interaction between the whale and the barnacles growing on its back.

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Important Questions on Organisms and Populations

MEDIUM
Biology>Ecology>Organisms and Populations>Population
The figure below demonstrates the growth curves of two organisms A and B growing in the same area. What kind of relation exists between A and B?

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EASY
Biology>Ecology>Organisms and Populations>Population
The monarch butterfly avoids predators such as birds by:
HARD
Biology>Ecology>Organisms and Populations>Population
In some species, individuals forego reproduction and help bring up another individual's offspring. Such altruistic behavior CANNOT be explained by which of the following?
EASY
Biology>Ecology>Organisms and Populations>Population
From the given options, identify the correct combination of population interactions that correspond to the symbols given here.
EASY
Biology>Ecology>Organisms and Populations>Population
If ' + ' sign is assigned to beneficial interaction, ' – ' sign to detrimental and ' 0 ' sign to neutral interaction, then the population interaction represented by '+' '-' refers to
MEDIUM
Biology>Ecology>Organisms and Populations>Population

Assertion (A): The Monarch butterfly feeds on poisonous weeds during its caterpillar stage.

Reason (R): It helps butterfly to become distasteful to the predator.

EASY
Biology>Ecology>Organisms and Populations>Population
Which of the following interactions does NOT promote coevolution?
EASY
Biology>Ecology>Organisms and Populations>Population
Inspite of interspecific competition in nature, which mechanism the competing species might have evolved for their survival?
HARD
Biology>Ecology>Organisms and Populations>Population

Given the graphs below, the interaction between species 1 and 2 can be classified as

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HARD
Biology>Ecology>Organisms and Populations>Population
Mutualism is
EASY
Biology>Ecology>Organisms and Populations>Population
The function of aposematic colouration is to
EASY
Biology>Ecology>Organisms and Populations>Population
Which of the following statements is incorrect?
MEDIUM
Biology>Ecology>Organisms and Populations>Population

Match column-I with column-II and select the correct option.

Column-I Column-II
a) Commensalism i) Lichen
b) Mutualism ii) Plasmodium
c) Parasitism iii) Hawk
d) Predation iv) Orchid
EASY
Biology>Ecology>Organisms and Populations>Population
The interaction between "Cuckoo and Crow" is an example for
EASY
Biology>Ecology>Organisms and Populations>Population
Amensalism can be represented as:
EASY
Biology>Ecology>Organisms and Populations>Population

Match the following. The correct combinations are

The list I List II List III
(a) Fig tree (i) Highly distasteful (p) Petals of its flower
(b) Ophrys (ii) Cryptically coloured (q) Special chemical present
(c) Sea anemone (iii) Wasp (r) Clownfish
(d) Camouflage (iv) Sexual deceit (s) Developing seeds
(e) Monarch butterfly (v) Stinging cells (t) Insects and frogs

 

EASY
Biology>Ecology>Organisms and Populations>Population

Match the following?

The list I List II
(i) Calotropis (a) Predator of Americana Pacific
(ii) Cactus (b) Insects and frogs cryptically coloured
(iii) Pisaster (c) Distasteful glycosides
(iv) Monarch Butterfly (d) Cardiac glycosides
(v) Camouflage (e) Predator is a moth

 

EASY
Biology>Ecology>Organisms and Populations>Population
Which one of the following population interactions is widely used in medical science for the production of antibiotics?
HARD
Biology>Ecology>Organisms and Populations>Population
Which of the following statements is/are incorrect?
1) The human liver fluke, a nematode parasite, depends on two intermediate hosts (a snail and a fish) to complete its life cycle.
2) The malarial parasite needs a vector (mosquito) to spread to other host organisms.
3) In case of brood parasitism, the eggs of parasitic birds (e.g., cuckoo) are not detected and removed from the nest because the parasite's eggs resemble the host's eggs in morphology and colour.
4) A population of frogs protected from all predators would decrease indefinitely.
HARD
Biology>Ecology>Organisms and Populations>Population
Match Column - I with Column - II
  Column-I     Column-II
a  Saprophyte  i Symbiotic association of fungi with plant roots
b Parasite ii  Decomposition of dead organic materials
c  Lichens iii Living on living plants
d  Mycorrhiza iv  Symbiotic association of algae and fungi

Choose the correct answer from the options given below: