Which of the following reptilian hearts can be that of a crocodile?

1. 2.
3. 4.

Subtopic:  Study of Reptilia |
 55%
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‘Madreporite’ is a part of:

1. Excretory system of platyhelminthes
2. Water vascular system of echinoderms
3. Sensory system in mollusks
4. Feeding apparatus in Cnidarians
Subtopic:  Phylum Echinodermata |
 57%
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The structure marked as ‘S’ in the given diagram helps bony fishes in:


 

1. Oxygenation of blood
2. Achieving neutral buoyancy
3. Increasing absorptive surface area for food
4. Protection of the nerve cord

Subtopic:  Comparative study of Cartilagenous & Bony Fishes | Class Osteichthyes |
 73%
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Identify the incorrect statement regarding echinoderms:

1. Echinoderms evolved from animals with bilateral symmetry.
2. Echinoderms have a mesodermal skeleton composed of calcareous plates or ossicles.
3. Most echinoderms are not able to reproduce asexually and regenerate tissues, organs, and limbs.
4. Echinoderms are also the largest phylum that has no freshwater or terrestrial (land-based) representatives.
Subtopic:  Phylum Echinodermata |
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The bone structure in the following diagram shows:


 

1. Adaptation for flight in birds
2. Presence of excess of the hemopoietic tissue in mammals
3. Rudimentary limb bones in some reptiles
4. Bone of forelegs of frogs

Subtopic:  Study of Aves & Mammals |
 74%
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Common characteristic of fishes do not include:

1. Single loop circulation
2. Vertebral column
3. Ability to synthesize aromatic amino acids
4. Internal gills


 

Subtopic:  Comparative study of Cartilagenous & Bony Fishes |
 54%
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The second largest group of dueterostomes are:

1. Echinoderms 2. Hemichordates
3. Chordates 4. Arthropods
Subtopic:  Phylum Echinodermata |
 52%
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The closest relative of the vertebrates are:
1. Echinoderms
2. Lancelets
3. Tunicates
4. Hemichordates

Subtopic:  Phylum Chordata |
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Considering lampreys and hagfish:

I. Both groups have jawless mouths with horny epidermal structures that function as teeth.
II. Both groups have branchial arches that are internally positioned instead of external as in jawed fishes.
 
1. Only I is correct
2. Only II is correct
3. Both I and II are correct
4. Both I and II are incorrect

Subtopic:  General Introduction: Vertebrates & Agnatha | Class Cyclostomata |
 54%
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The tunic of urochordates is composed of proteins and complex carbohydrates, and includes tunicin, which is a variety of:

1. cellulose 2. amylopectin
3. agaropectin 4. alginic acid
Subtopic:  Phylum Chordata |
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