Question

write how parasites have evolved with adaptation to coexist with their host in an ecosystem.​

Answer 1

Answer:

they develop special root-like structure called haustoria

Explanation:

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Answer 2

Hosts and parasites exert reciprocal selective pressures on each other, which may lead to rapid reciprocal adaptation. ... If the host evolves a special mechanism for rejecting or resisting the parasite, then the parasite has to (simultaneously) evolve i..e, co-evolve the mechanism to counteract and them.