The interacting species live closely together in which of the following interaction?
Parasitism, Predation and Commensalism
Commensalism, Amensalism
Mutualism and Competition
Parasitism, Mutualism, Commensalism
Predation can be thought as
Prey's way to control its the population
Nature's way of transferring energy to higher trophic levels.
Nature's way of controlling predators food chain
Predator's way of controlling prey's energy level
In a broad ecological context, which of the following can be a predator?
Seed eating sparrow
Lion
Tiger
Crow
Predators cannot perform
conduit for energy transfer
control prey species
make the ecosystem stable
Keep a check on diversity of species
Why does the exotic species become invasive and start spreading fast?
It gets better nutrition there.
Because of the lack of competition from other exotic plants
Because of the lack of natural predator
Because of the successful establishment of the food web.
The prickly pear cactus introduced in Australia in the 1920s got famous because of the lack of which population interaction?
Competition
Predation
Parasitism
Amensalism
The invasiveness of prickly pear cactus in Australia was controlled by introducing a predator from its natural habitat and this predator was
A ladybird
A moth
A wasp
A desert fly
Among the rocky Intertidal communities of the American Pacific coast, the starfish Pisaster is an important
Prey
Predator
Parasite
Competitor
If in a hypothetical case, you remove a predator from an ecosystem and as a result few prey species get extinct. What does it show
Interspecific competition
Intraspecific competition
Commensalism
When the predator keeps on eating the prey, then in the end there should be no more prey to be eaten by the predator. But this situation is not observed in the case of predation in nature. Because
1. Predators are prudent enough
4. Both 1 nd 2
2. Prey has developed a defense mechanism not to allow predators to overexploit them
3. Plants have developed behavioral and hemical defenses.
Monarch Butterfly
Biochemical defense mechanism
Acquires it during its caterpillar stage by feeding on poisonous weed
Highly distasteful to predator Zebra
Both 1 and 2
How many insects are phytophagous? And such interaction is called as
30%, parasitism
25% predation
33% commensalism
40% mentalism
Acacia and Cactus show which kind of defenses?
Biochemical
Biomolecular
Morphological
Behavioural
Calotropis doesn't allow any cows and goats to browse around by releasing
Cardiac glucosamine
Cardiac glucoside
Cardiac glycoside
Cardiac nitroxide
Which of the following is not produced plants as a product of defense mechanism?
Nicotine, quinine
Caffeine
Strychnine
Tumrine
Darwin was convinced enough for considering………. A potential force in organic evolution.
Mutualism
Competition occurs when closely related species compete for the same resources that are limiting.
In this statement two concepts are emphasized, one is closely related species and the other the resources are limiting.
first concept is entirely wrong while the second concept is entirely correct.
First concept is right while the second is partially correct
Both are not entirely correct
Both are entirely correct.
In some shallow South American lakes visiting Flamingoes and Resident Fishes show which kind of interaction?
The feeding efficiency of one species might be reduced due to the inhibitory presence of another species with abundant food and space. What does it imply?
For competition to occur, resources need not be limited
Interference competition
They are competing over the same food
Competition can be defined best as
1. A process in which the fitness of one species i.e. r is significantly lower in the presence of another species.
2. Competition occurs when closely related species compete for the same resources that are limiting.
3. A proess which not always lead to loss of both the organisms
Gause's competitive exclusion principle applies only when
Species are closely related to each other
Competing for the same resources
Resources are limiting
All of these
The Abingdon tortoise in Galapagos Islands became extinct within a decade after goats were introduced on the island apparently due to
Superiority of goats
Greater browsing efficiency of goats
Higher value
Competitive release
Gause's Competitive Exclusion Principle is challenged by
Resource Partitioning
Mutual exclusion
MacArthur's Warblers living on the same tree showed which type of interaction?
Interspecific Competition
Co-existance
Intraspecific Competition
MacArthur's Warblers could coexist due to
Behavioral differences in their foraging activities
Temporal differences in their foraging activities
Spatial differences in their foraging activities
Both 1 and 3
The occurrence of competition in nature, proof for this, comes from
Behavioral changes in foraging patterns of warblers
In Connell's elegant field experiments, on the Rocky sea coasts of Scotland which of the following observation was recorded?
Barnacle Balanus dominates and exclude the smaller barnacle Chathamalus from that zone
Barnacle Chathamalus dominates Barnacle Balanus and exclude them from that zone.
Barnacle Balanus dominates and excludes smaller warblers from that zone.
Warblers dominate and exclude smaller Balanus from that area.
…….. and ……...appear to be more adversely affected by competition than…….
Plants, Carnivores, Herbivores
Carnivores, Herbivores, Plants
Omnivores, Carnivores, Plants
Plants, Herbivores, Carnivores
Which of the following is not correct with respect to parasites?
Harm the host
Reduce survival, growth of the host.
Doesn't affect population density of host as no effect on reproduction ability of the host
Render host more vulnerable to predation by making it physically weak.
Female mosquito
Needs our blood for reproduction
Get some nutrition from our body
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