Q. No.| Animal | Division of Labour |
| i. Pheretima ii. Fasciola iii. Spongilla iv. Obelia |
A. Organ level B. Cellular aggregate level C. Tissue level D. Organ system level |
1. (i)-B, (ii)-C,(iii)-D and (iv)-A
2. (i)-B, (ii)-D,(iii)-C and (iv)-A
3. (i)-D, (ii)-A, (iii)-B and (iv)-C
4. (i)-A,(ii)-D,(iii)-C and (v)-B
What is present between ectoderm and endoderm in diploblastic animals?
| 1. | Mesenteron | 2. | Mesenchyme |
| 3. | Mesorchium | 4. | Mesoglea |
When any plane of section passing through the central axis of body, divides the organism into identical halves, it is called
1. Radial symmetry
2. Biradial symmetry
3. Bilateral symmetry
4. Spherical symmetry
In some Bilateria, the body is of many segments that show serial repetition of parts. Such segments are called as:
1. Myotomes
2. Metameres
3. Proglottides
4. Comb plates
Notochord is derived from embryonic:
| 1. | Ectoderm | 2. | Mesoderm |
| 3. | Endoderm | 4. | Ectoderm and Mesoderm |
Identify the phylum where the body cavity is not lined by mesoderm, instead, the mesoderm is present as scattered pouches between ectoderm and endoderm?
| 1. | Cnidaria | 2. | Platyhelminthes |
| 3. | Molluska | 4. | Aschelminthes |
Mark the incorrect statement
| 1. | Radial symmetry is advantageous to sedentary mode of life |
| 2. | Notochord is mesodermal in origin placed between dorsal hollow nerve cord and alimentary canal in some animals |
| 3. | Pseudocoel (false coelom) derived from blastocoel of the embryo and is bounded by ectoderm and mesoderm |
| 4. | Cephalization is the concentration of sense organs, nervous tissue (brain), and food capturing organs at the anterior end |
A true coelom is between
| 1. | Mesoderm and endoderm |
| 2. | Ectoderm and mesoderm |
| 3. | Body wall and endoderm |
| 4. | Body wall and mesoderm |
All triploblastic animals primarily possess
| 1. | Bilateral symmetry |
| 2. | True coelom |
| 3. | Unisexuality with sexual dimorphism |
| 4. | Regeneration power |
In some animal groups, the body is found divided into compartments with at least some organs. This characteristic feature is called
| 1. | Segmentation | 2. | Metamerism |
| 3. | Metagenesis | 4. | Metamorphosis |
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