Question 17: Give one example for each of the following types.
a) Migratory animal
b) Camouflaged animal
c) Predator animal
d) Biological control agent
e) Phytophagous animal
f) Chemical defense agent
Answer:
(a) Migratory animals: Migratory animals are those which moves from one place to another and later they get return to avoid the unfavourable climatic conditions. For example: Eels, which lives in the western world. They migrates from fresh water down into the open sea in the northern region for the reproduction. For the development, their young ones return to the original place up the stream.
(b) Camouflaged animal: Camouflaged animals are those which have the ability to blend themselves with the environment. So that they remain unnoticed for the protection or aggression from being captured by the predators. For example: Leaf insect is green in colour, so they resembles with the green leaf, therefore camouflaging themselves to avoid predators.
(c) Predator animal: Predatory animals are those which feeds on the prey (which is being caught). All the carnivores are the predatory animals. For example: Tiger, Lion which feeds on the deer etc.
(d) Biological control agent: Biological control agents are those which reduces the growth of pests or an unwanted organisms that affects the growth of plants, by using biological agents. For example: release of parasitic wasps to control aphids (sap sucking insects) etc.
(e) Phytophagous animal: Phytophagous are those animals which feeds on green plants and attacks on roots, stems etc. For example: all species of grasshopper are phytophagous.
(f) Chemical defense agent: Chemical defensive agents like venomous substances etc. are used by the prey for the reduction of predator attack.
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