$a.$ 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
All $a$ & $e$ are correct
Only $a$, $b$, $d$ & $e$ are correct
Only $a$, $b$, $c$, $d$ are correct
Only $a$, $b$, $c$, $d$ are correct
When the organisms live together in such a manner that one organism is benifitted, while other has no effects, it is called
Give the scientific names of any two microorganisms inhabiting the human intestine.
Association between suckerfish $ (Remora) $ and shark is
Match the columns :
Column - $I$ | Column - $II$ |
(a) Mutualism | $(i)$ $\quad$ Diapause |
(b) Commensalism | $(ii)$ Hibernation |
(c) Parasitism | $(iii)$ Dormancy |
(d) Predation | $(iv)$ Aestivation |
If $'+'$ sign is assigned to beneficial interaction, $'-'$ sign to detrimental and $'O'$ sign to neutral interaction, then the population interaction represented by $'+'\, '-'$ refers to