CBSE
Multiple Choice QuestionsWhich one of the following animal phyla possesses spicule?
Annelida
Mollusca
Porifera
Platyhelminthes
The body of Rohu fish is covered by
cycloid scale, but the tail of homocercal
placoid scale, but the tail of heterocercal
cycloid scale, but the tail of heterocerca
placoid scale, but the tail is homocercal
Which one is an example of living fossil?
Coral
Ascidia
Octopus
King crab
Muga silk worm feeds on
Shorea
Terminalia
Machilus
Marus
The scientific name of the moth which produce tasar is
Bombyx mori
Antherae mylitta
Antherae assamensi
Philosomia ricini
Fin rot of fish is caused by
Aeromonas
Pseudomonas
Branchiomyces
Xenopsylla
One of the representative of Phylum - Arthropoda is
cuttlefish
silverfish
pufferfish
flying fish
Which one of the following animal phyla does not possess a coelom?
Platyhelminthes
Annelida
Mollusca
Echinodermata
In most simple type of canal system of Porifera, water flows through which one of the following ways?
Ostia Spongocoel Osculum Exterior
Spongocoel Ostia Osculum Exterior
Osculum Spongocoel Ostia Exterior
Osculum Ostia Spongocoel Exterior
Select the wrong statement.
Isogametes are similar in structure, function and behaviour
Anisogametes differ either in structure, function and behaviour
In oomycetes female gamete is smaller and motile, while male gamete is larger and non-motile
Chlamydomonas exhibits both isogamy and anisogamy and Fucus shows oogamy
