Animal Kingdom - 19-08-23

Which one is correct?

I. Sponges : Cellular level of organization

II. Cnidaria : Tissue level of organization

III. Platyhelminthes : Organ level of organization

IV. Annelids, Arthropods, Molluscs, Echinoderms and Chordates : Organ system level of organization

• (a) All are correct

• (b) II and IV are correct

• (c) II and III are correct

• (d) I and II are correct

Choose the false option –

• (a) Sponges : Mostly asymmetrical

• (b) Cnidaria, Ctenophora and Adult Echinoderms : Radial symmetry

• (c) Annelids, Arthropods, Molluscs and Chordates : Bilateral symmetry

• (d) None of the above

Diploblastic and Triploblastic are terms that describe –

• (a) The number of invagination during development

• (b) The number of heads during development

• (c) The number of tissue layers during embryonic developments

• (d) The number of cell types during development

An undifferentiated layer present between ectoderm and endoderm is called –

• (a) Mesoglea

• (b) Mesoderm

• (c) Mesentery

• (d) Parenchyma

Which one is correct?

I. Diploblastic : Porifera, Coelenterates

II. Triploblastic : Platyhelminthes to chordates

III. Acoelomata : Porifers, Coelenterates, Platyhelminthes

IV. Pseudocoelomata : Aschelminthes / Round worms

V. Eucoelomata : Annelids to chordates

• (a) All are false

• (b) All are correct

• (c) I, II and V are correct

• (d) Only V is correct

Metamerism is the characteristic of –

• (a) Platyhelminthes

• (b) Mollusca

• (c) Porifera

• (d) Annelida (e.g. earthworm)

Metamerism refers to –

• (a) Mesoblastic development

• (b) Occurrence of mesoderm

• (c) Segmentation where external divisions correspond to internal divisions

• (d) Metastasis

Which one is correct?

• (a) Notochord is ectodermal in origin present in some animal

• (b) Notochord is a mesodermally derived rod like structure formed on the dorsal side in embryonic development in some animals

• (c) Porifera to Echinodermata are non-chordates

• (d) b and c

Water exits from sponges through the –

• (a) Osculum

• (b) Ostia

• (c) Spicules

• (d) Choanocytes

A, B and C are found in –

• (a) Annelids, Aschelminthes, Platyhelminthes respectively

• (b) Platyhelminthes, Annelids, Aschelminthes respectively

• (c) Aschelminthes, Platyhelminthes, Annelids respectively

• (d) Sponges, Aschelminthes, Platyhelminthes respectively