Advertisements
Advertisements
Question
Define the following term:
Camouflage
Advertisements
Solution
Camouflage, also called cryptic colouration, is a defense mechanism or tactic that organisms use to disguise their appearance, usually to blend in with their surroundings. Organisms use camouflage to mask their location, identity, and movement.
APPEARS IN
RELATED QUESTIONS
During .............. typs of interaction, both organisms are benefited
- mutualism
- competition
- commensalism
- parasitism
Write what do phytophagous insects feed on.
Describe the mutual relationship between fig tree and wasp and comment on the phenomenon that operates in their relationship.
Name important defence mechanisms in plants against herbivory.
Answer the following question.
Mention the term used to describe a population interaction between an orchid growing on a forest tree.
The number of deaths under ideal conditions is known as ______.
Competition between species leads to ________.
Identify the interspecific interaction in which species A is harmed and species B is unaffected.
Two species competing for the same resources, avoid competition by choosing different times for feeding, also known as ______
Identify the morphological means of defence to avoid herbivores shown by plants.
Which of the following is TRUE for amensalism?
Type of interspecific interaction wherein one organism is benefited and other is harmed is called ____________.
Cattle egrets always foraging close to the grazing cattle is an example of ____________.
Match the Columns.
| Column A | Column B | ||
| i. | Lice on humans | a. | Endoparasites |
| ii. | Ectoparasites on marine fishes | b. | Grows on hedge plants |
| iii. | Cuscuta | c. | Ectoparasites |
| iv. | Plasmodium and humans | d. | Copepods |
Identify the type of negative interaction.
Lichens showing relationship between alga and fungus is an example of ____________ type of interaction.
Which one of the following pair does NOT show commensalism?
Rafflesia an arnoldii is an example of ______.
______ in birds is an interesting example of parasitism in which the parasitic bird lays its eggs in the nest of its host and the host incubates them.
Amensalism is an association between two species where ______.
Which of the following is a partial root parasite?
Define stenohaline species.
Define ectoparasite and endoparasite and give suitable examples.
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 | ______ |
In an association of two animal species, one is a termite which feeds on wood and the other is a protozoan Trichonympha present in the gut of the termite. What type of association they establish?
Give one example for the following type.
Predator animal
Give one example for the following type.
Biological control agent
While living in and on the host species, the animal parasite has evolved certain adaptations. Describe these adaptations with examples.
Pick out the appropriate association representing brood parasitism.
Sea Anemone gets attached to the surface of the hermit crab. The kind of population interaction exhibited in this case is ______.
Name any two categories of organisms that in general are adversely affected by competition.
Between which among the following, the relationship is not an example of
?
Interspecific interaction could be ______.
Interaction between clown fish living among the stinging tentacles of sea anemone is an example of ______.
"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.
The diagram given below shows the life cycle of a malarial parasite. Study it carefully and answer the questions that follows:

- Name the hosts in which the asexual phase and sexual phase of the life cycle takes place.
- Identify the infective stage labelled ‘D’.
- Name the structure labelled ‘A’ and ‘E’.
- Give any one symptom of malaria.
Give one example of commensalism.
Give one example of parasitism.
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:
