Animal Kingdom Test 1

Annelida are aquatic (marine and freshwater) or terrestrial, free-living, and sometimes parasitic. They are bilateral symmetric and triploblastic.

Coelomic fluids serves as a skeleton in some insects called as hydrostatic skeleton that help in maintaining shape and size of the body of organisms in absence of bone or cartilage

Ichthyophis is a species of caecilians; the limbless amphibians usually observed in Southeast Asia, the western Indo-Australian Archipelago and the southern Philippines.

At first look, this animal seems to be an earthworm. This is the class that has an aquatic larval degree and a mundane grown-up phase.

The insects belong to phylum Arthropoda and hence, the excretory organ is Malphighian tubules.

Metamerism: In some animals, the body is externally and internally divided into segments with a serial repetition of at least some organs.

For example, in earthworm, the body shows this pattern called metameric segmentation and the phenomenon is known as metamerism or true segmentation. Metamerism is found in 3 animal phylums - Annelida, Arthropoda and Chordata.

Animals possessing coelom are called coelomates, e.g.,annelids, molluscs, arthropods, echinoderms, hemichordates and chordates

The members of class-Chondrichthyes are marine animals with streamlined body and have cartilaginous endoskeleton.

Air bladder provides buoyancy to the aquatic animals thus helps them to stay at the current water depth without having to waste energy in swimming. It is found in many bony fishes but not in cartilaginous fishes. Shark being a cartilaginous fish, does not possess air bladder.
So, the correct answer is option B.

Locust (Locusta) is a gregarious pest belonging to phylum Arthropoda.

The larvae of urochordates is called tadpole larva. This larva is free-swimming and exhibits all chordate characteristics. It has a notochord, a dorsal nerve cord, pharyngeal slits and a post-anal tail.

In coelenterates, the arrangement of cells is more complex. Here, the cells performing the same function are arranged into tissues, hence is called tissue level of organisation.

• Cleidoic egg is the term which is used to refer any closed egg of a land animal. It is also known as amniotic egg, because it occurs peculiarly in amniotes.
• It is laid by aves and reptiles. It involves internal fertilization because the eggs are laid on land, internal fertilization is needed and thus development occurs after the laying the eggs externally.

Symmetry is an attribute of an organism showing regularity in body parts on a plane or around an axis. In Phylum Echinodermata, the adult echinoderms are radially symmetrical but the larvae are bilaterally symmetrical. 

The animal is identified as Euspongia which belongs to phylum Porifera.

The Asian tiger mosquito (Aedes albopictus) is a small black and white mosquito, about 1/4-inch long.

This picture is Pseudoceolomate because patches of mesoderm is lined, and Pseudoceolomate animal are aschehelmenthis so, the answer is roundworm.

The zoological name of fresh water sponge is Spongilla.

Class-Cyclostomata is comprised of  the living jawless fishes. Their mouth is circular and lack jaws, hence they are also called agnathans.  It is surrounded by tentacles (e.g., lampreys and hellish). These also presses retractable teeth.

Saccoglossus belong to phylum Hemichordata and hence the excretory organ is proboscis gland.

Giant panda is going to extinct due to low reproductive rate. They live in mountain ranges in central china. Their reproduction rate is vary less due to climatic conditions.

• Interstitial cells can differentiate to perform different functions.
• Choanocytes is the characteristics cells of porifera.
• Gastrodermal cells and Nematocytes are found in Hydra.

Limulus polyphemus or Atlantic horseshoe crab are considered 'living fossils' as they haven't undergone obvious morphological changes in comparison with Carboniferous and Triassic fossil forms. Moreover, they are the only ones that survived different extinction events.

Platypus is oviparous as it is an egg-laying mammal. Rest three are viviparous mammals.

Reptiles generally possess three chamber heart, two upper chamber and single lower chamber. But in crocodile, the heart is four chambered having two atrium and two ventricles.

• In cockroaches excretion of waste material occurs through Malpighian tubules.
• In prawns excretion of waste material occurs through green glands or antennal glands.