While living in and on the host species, the animal parasite has evolved certain adaptations. Describe these adaptations with examples.
In accordance with their life styles, parasites evolved special adaptations.
These are the loss of unnecessary sense organs, presence of adhesive organs or suckers to cling on to the host (e.g. suckers in tape worm), loss of digestive system (e.g. tapeworm) high reproductive capacity (e.g. roundworm).
The life cycles of parasites are often complex, involving one or two intermediate hosts or vectors to facilitate parasitisation of its primary host.
What is the interaction between two species called ?
Statements
$I.$ Recent studies support competition as suggested in 'Gauses's Competitive Exclusion Principle'
$II.$ Gause's hypothesis says if two species compete for same resources then one will be eliminated by another species
$III.$ More recent studies point out that species facing competition might evolve mechanisms that promote co-existence rather than exclusion
$IV.$ Gause's competitive exclusion principle is effective when resources are in excess
$V.$ Unlimited resources give better opportunity for adaptation
Choose the correct combination of statements
$a.$ Loss of unnecessary sense organs
$b.$ Pressence of adhesive organs
$c.$ Presence of suckers
$d.$ High reproductive capacity
$e.$ Well developed digestive system
Choose correct option w.r.t. parasites
Which of the following is most appropriately defined?