Practice free Organism and Population (Botany) NEET multiple-choice questions online with instant answers and detailed explanations. No login required.
Brood parasitism is a fascinating example of parasitism where:
The NCERT text explicitly defines brood parasitism: 'Brood parasitism in birds is a fascinating example of parasitism in which the parasitic bird lays its eggs in the nest of its host and lets the host incubate them.'
Which of the following protozoans is a notorious malarial parasite known for its infectious spore-like stage?
Under Sporozoans, the NCERT states, 'The most notorious is Plasmodium (malarial parasite) which causes malaria, a disease which has a staggering effect on human population.'
A parasitic fungus responsible for white spots on mustard leaves belongs to which kingdom?
The NCERT text mentions, 'White spots seen on mustard leaves are due to a parasitic fungus.' The fungi constitute a unique kingdom of heterotrophic organisms.
In the context of the statement 'one organism is benefited, other is affected,' which option best explains parasitism?
The summary explicitly states, 'predation and parasitism (one benefits and the other suffers).' Therefore, 'one organism is benefited, and the other is harmed' accurately describes parasitism.
Which of the following is an example of an endoparasite that lives inside the host's body at different sites (e.g., liver, kidney, lungs, red blood cells)?
The NCERT defines endoparasites as 'those that live inside the host body at different sites (liver, kidney, lungs, red blood cells, etc.).' Plasmodium (malarial parasite) is an example of such and is explicitly mentioned as living in the red blood cells, causing malaria.
The close living arrangement between interacting species is a common characteristic shared by which of the following interactions?
The NCERT states, 'Predation, parasitism and commensalism share a common characteristic – the interacting species live closely together.'
Cuscuta is described as a parasitic plant because it:
The NCERT text mentions, 'Cuscuta, a parasitic plant without chlorophyll and leaves in the course of evolution. It derives its nutrition from the host plant which it parasitises.'
The life cycles of endoparasites are more complex due to their extreme specialisation, which often leads to:
The NCERT states, 'Their morphological and anatomical features are greatly simplified while emphasising their reproductive potential.'
Why has the parasitic bird's egg evolved to resemble the host's egg in size and colour in brood parasitism?
The NCERT explains, 'During the course of evolution, the eggs of the parasitic bird have evolved to resemble the host’s egg in size and colour to reduce the chances of the host bird detecting the foreign eggs and ejecting them from the nest.'
Match List I (Interaction) with List II (Species A and B):
| List I | List II |
|---|---|
| A. Mutualism | I. +(A), O(B) |
| B. Commensalism | II. -(A), O(B) |
| C. Amensalism | III. +(A), -(B) |
| D. Parasitism | IV. +(A), +(B) |
Mutualism +/+; Commensalism +/0; Amensalism −/0; Parasitism +/−.
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