Which one of the following is the infective stage of Ascaris lumbricoides?
Unsegmented egg
Egg with first stage larva
Egg with second stage larva
Free third stage larva
C.
Egg with second stage larva
Ascaris has no intermediate host and man acquires infection by directly ingesting Ascaris eggs containing the infective second stage rhabditoid larva with contaminated food or water.
In which of the following phyla, compound eyes are present?
Annelida
Arthropoda
Mollusca
Echinodermata
Water vascular system is present in which of the following phylum?
Porifera
Cnidaria
Ctenophora
Echinodermata
Mesoglia is seen in between
ectoderm and endoderm
ectoderm and mesoderm
mesoderm and endoderm
just below mesoderm
The parasite, which completes its life cycle in a single host is
Fasciola hepatica
Plasmodium vivax
Taenia solium
Ascaris lumbricoides