Advertisements
Advertisements
Questions
What is brood parasitism? Explain with the help of an example.
Explain Brood parasitism with the help of a suitable example.
Advertisements
Solution
- Brood parasitism is a reproductive technique used by some bird species in which one bird, known as the brood parasite, lays eggs in the nest of another bird species, known as the host. The host bird then incubates and nurtures the eggs as if they were its own, frequently to the detriment of its own young.
- The conduct of the common cuckoo is an excellent example of brood parasitism. Female cuckoos lay their eggs in the nests of other bird species, including crows. Cuckoo eggs closely resemble the host's eggs, making it less likely that the host will discover the incursion. The parasite bird's eggs have developed to mimic the host's egg in size and colour over time, reducing the likelihood of the host bird recognising and ejecting the foreign eggs from the nest.
APPEARS IN
RELATED QUESTIONS
Apart from being a part of the food chain, predators play other important roles. Mention any two such roles supported by examples.
Define population growth. Explain different types of age pyramids.
Competition between species leads to ________.
Tabulate and analysis of two species population interaction.
Which principle/theory states that 'Two closely related species competing for the same resources cannot co-exist indefinitely and the competitively inferior will be eliminated eventually.'?
______ is the adaptation of an organism i which it matches its colour with its surroundings to get protected from predators.
The correct description for the interspecific interaction shown in the given figure is ______
In the given picture, identify the type of interspecific interaction.
With the decline in the population of fig species it was noticed that the population of wasp species also started to decline. What is the relationship between the two and what could be the possible reason for decline of wasps?
A population has more young individuals compared to the older individuals. What would be the status of the population after some years?
In a pond, we see plants which are free-floating; rooted–submerged; rooted emergent; rooted with floating leaves; Write the type of plant against the following examples.
| Plant Name | Type | |
| a. | Hydrilla | ______ |
| b. | Typha | ______ |
| c. | Nymphaea | ______ |
| d. | Lemna | ______ |
| e. | Vallisneria | ______ |
Write the observations made at the end of Connell's field, experiment on barnacles on the rocky sea coasts of Scotland.
"Some species of insects and frogs have evolved with various specific features that help them from being detected."
- Justify the statement giving reasons.
- Mention any two such features.
Statement I: Gause’s competitive exclusion principle states that two closely related species competing for different resources cannot exist indefinitely.
Statement II: According to Gause’s principle, during competition, the inferior will be eliminated. This may be true if resources are limiting.
In the light of the above statements, choose the correct answer from the options given below:
Parasitism is an interaction between two organisms in which ______.
Statement I: Gause’s ‘Competitive Exclusion Principle states that two closely related species competing for the same resources cannot co-exist indefinitely and competitively inferior one will be eliminated eventually.
Statement II: In general, carnivores are more adversely affected by competition than herbivores.
In the light of the above statements, choose the correct answer from the options given below:
In commensalism, how is the unaffected species impacted by the interaction?
Cattle egrets feeding on insects disturbed by grazing cattle is an example of which population interaction?
Tall plants blocking sunlight for smaller nearby plants is an example of which population interaction?
What is the sign convention for neutralism?
