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Animal Kingdom
1) An undifferentiated layer present between ectoderm and endoderm is called -
A) Mesoglea
B) Mesoderm
C) Mesentery
D) Parenchyma
Answer A) Mesoglea
In diploblastic animals Mesoderm is absent instead an undifferentiated layer called mesoglea is present
2) Which of the following characteristics is not associated with members of cnidaria or coelenterate?
A) Alternation of generation (metagenesis between polyp and medusa)
B) Nematocysts, gastrovascular cavity, extracellular+ intracellular digestion
C) Nematocyst i cnidoblast
D) Triploblastic forms
Answer D) Triploblastic forms
Cnidarians are diploblastic in nature
3) Some cnidarian like coral e.g. meandrina (brain coral) exoskeleton is composed of-
A) Silicious
B) CaCO3
C) Chitinous
D) Proteinaceous
Answer B) CaCO3
Calcium carbonate is present in certain corals
4) The metagenesis is seen in -
A) Hydra
B) Adamsia (sea anemone)
C) Aurelia
D) Obelia
Answer D) Obelia
Metagenesis is alternation of generation
5) Select the correct one for ctenophora -
A) They have similarities with cnidaria
B) They have 8 external rows of ciliated comb plates for locomotion
C) Bioluminescence
D) All
Answer D) All
When living organisms emit light it is called as bioluminescence
6) Common character between flatworms, roundworms and earthworms is -
A) bilaterally symmetrical
B) organ-system level of body organisation
C) Triploblastic
D) All the Above
Answer D) All the Above
Their body is formed of 3 layers with organ-system level of body organisation and bilaterally symmetry
7) A feature absent in annelids is -
A) Nephridia (osmoregulatory +excretory organ).
B) Lateral swimming appendages in aquatic forms like nereis
C) Longitudinal and circular muscles helping in locomotion
D) Pseudocoelom
Answer D) Pseudocoelom
Annelids are the first eucoelomates
8) Over 2/3 of all named species on earth belong to -
A) Arthropoda
B) Annelida
C) Chordata
D) Flatworms
Answer A) Arthropoda
Arthropoda is the largest phylum over contributes flre thar 2/3 belong animals
9) Which one is the second largest animal phylum?
A) Mollusca
B) Arthopoda
C) Chordata
D) Cnidaria
Answer A) Mollusca
Mollusca is the 2nd largest phylum next to arthropoda
10) Spiny skinned animals with radial symmetry in adult and bilateral in larva belong to -
A) Echinodermata
B) Arthropoda
C) Mollusca
D) Annelida
Answer A) Echinodermata
Spines in echinoderms are made of calcium
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