Which of the following reptilian hearts can be that of a crocodile?
1. | 2. | ||
3. | 4. |
‘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 |
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 |
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. |
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 |
Common characteristic of fishes do not include:
1. | Single loop circulation |
2. | Vertebral column |
3. | Ability to synthesize aromatic amino acids |
4. | Internal gills |
The second largest group of dueterostomes are:
1. | Echinoderms | 2. | Hemichordates |
3. | Chordates | 4. | Arthropods |
The closest relative of the vertebrates are:
1. Echinoderms
2. Lancelets
3. Tunicates
4. Hemichordates
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 |
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 |