Q. No.Chordates are not characterized by:
1.
Ventral nerve cord
2.
Post anal tail
3.
Gill slits
4.
A notochord
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Notochord is derived from embryonic:
1. Ectoderm
2. Mesoderm
3. Endoderm
4. Ectoderm and Mesoderm
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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. Mollusca
4. Aschelminthes
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Sponges are mostly:
| 1. | Asymmetrical | 2. | Radially symmetrical |
| 3. | Bilateraly symmetrical | 4. | Biradially symmetrical |
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What is present between ectoderm and endoderm in diploblastic animals?
1. Mesenteron
2. Mesenchyme
3. Mesorchium
4. Mesoglea
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Mammals are not characterized by:
1. Presence of hair
2. Presence of mammary glands
3. Homodont dentition
4. Endothermy
The presence of mutable collagenous tissue is an important feature of:
1. Annelida
2. Echinodermata
3. Porifera
4. Molluska
Closed circulatory system is not seen in:
| 1. | Vertebrates | 2. | Annelids |
| 3. | Cephalopod Mollusks | 4. | Aquatic Arthropods |
Which of the following statements is not true about Nematodes?
1. They are bilaterally symmetrical, un-segmented worms
2. They are covered with a flexible, thick cuticle that is molted four times as they grow
3. They possess cilia or flagella on their reproductive cells
4. They possess a hydrostatic skeleton
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