Water vascular system is present in which of the following phylum?
Porifera
Cnidaria
Ctenophora
Echinodermata
D.
Echinodermata
The water vascular system is a hydraulic system used by echinoderms, such as sea stars and sea urchins, for locomotion, food and waste transportation, and respiration. It is composed of canals connecting numerous tube feet.
Mesoglia is seen in between
ectoderm and endoderm
ectoderm and mesoderm
mesoderm and endoderm
just below mesoderm
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
The parasite, which completes its life cycle in a single host is
Fasciola hepatica
Plasmodium vivax
Taenia solium
Ascaris lumbricoides
In which of the following phyla, compound eyes are present?
Annelida
Arthropoda
Mollusca
Echinodermata