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Digestion in Leucosolenia and other sponges is
only extracellular
only intracellular
first extracellular, then intracellular
first intracellular, then extracellular
B.
only intracellular
Digestion occurs in food vacuoles only, hence, it is completely intracellular.
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A cysticerous in pig muscles can remain alive for
six months
one year
six years
one month
C.
six years
Cysticerci remain alive for 5-6 years and are then calcified by the host (pig).
Tube within tube plan is exhibited by which of the following groups of animals?
Arthropods
Cephalochordates
Annelids
Mollusca
C.
Annelids
Annelids have straight alimentary canal representing a tube within a tube plan. In deuterostomatic animals anus develops earlier during embryonic development from
blastopore (e.g., all chordates and echinoderm invertebrates).
Molluscan blood contains
haemoglobin
haemozoin
haemocyanin
All of these
C.
haemocyanin
Haemocyanin is the characteristic respiratory pigment of only Mollusca and some arthropods.
Moulting in snakes is done by shedding
comified cells
stratified germinativum
epidermis
dermis
A.
comified cells
Stratum comeum is keratinized layer and is shed by snakes annually.
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Mock Test Series
