Bio Lab Practical Ii

The correct phylum and class combination is Arthropoda : Crustacea. Arthropods belong to the Phylum Arthropoda and crustaceans belong to the Class Crustacea. The other options provided are incorrect classifications within the animal kingdom.

The correct answer focuses on the absence of nuclei in amphibian red blood cells, highlighting a key difference between them and human red blood cells.

In Nematodes, the distinguishing factor between males and females is the curvature of the posterior end. A female Nematode will have a posterior end that is not curved or hooked, while a male will usually exhibit a curved posterior end. This characteristic helps in identifying the sex of the specimen.

In Nematodes, the distinction between males and females can often be determined by the curvature or shape of the posterior end. In the case of this specimen, the curved or hooked posterior end indicates that it is a male.

The correct answer is Cnidaria - anthozoa and Arthropoda - crustacea because these are the correct classification for the given phylum and class respectively.

Coral belongs to the phylum Cnidaria because it has polyps with nematocysts, which are stinging cells commonly found in this group of animals.

The correct answer is CnidariaAnthozoaNematocysts. Nematocysts are the stinging cells found on the tentacles of organisms belonging to the Cnidaria class Anthozoa. The incorrect answers provided do not match the specific characteristics of the organism mentioned in the question.

Hard corals, also known as stony corals, belong to the Phylum Cnidaria and Class Anthozoa. Their skeleton is made of Calcium Carbonate, specifically in the form of Calcarea. Therefore, options with different phylum,class, or skeleton material are incorrect answers.

Echinoidea is the correct answer as it refers to the class of the Phylum Echinodermata, which includes sea urchins and sand dollars. Ophiuroidea, Holothuroidea, and Asteroidea are other classes within the phylum, but they are not the specific class for Echinodermata.

Arteries have thick walls to withstand the high pressure of blood being pumped away from the heart, while veins have thin walls to facilitate the return of blood to the heart. Capillaries are thin-walled to allow for the exchange of gases and nutrients between blood and tissues.

This question tests the ability to differentiate between anatomical structures commonly found in organisms. The correct identification of these structures is crucial for understanding their functions in a biological context.

The correct answer is pseudocoelomate because the organism in question has a body plan with a pseudocoel, which is a fluid-filled cavity between the endoderm and the mesoderm. Acoelomates do not have a body cavity, coelomates have a true coelom, and diploblastic organisms have two germ layers instead of three.

Urochordates, commonly known as tunicates or sea squirts, belong to the subphylum Urochordata within the phylum Chordata. As adults, they lose most of their chordate characteristics, making them distinct from other chordates like Cephalochordates (e.g., lancelets), Hemichordates, and Echinoderms.

The correct answer is EchinodermataAsteroideafive arms, star-shape, ventral mouth, dorsal anus, tube feet with suckers. The incorrect answers describe characteristics and members of different phyla and classes.

The question is asking for the combination of Phylum and Class. The correct answer is ChordataReptilia, where Chordata is the Phylum and Reptilia is the Class. The incorrect answers provided do not match the given correct answer in terms of Phylum and Class combination.

Alpha keratin is a type of protein found in the structures made up of tough materials like horns, baleen, nails, claws, hooves, and hair, but not in feathers, scales, or fur.

The correct answer is ChordataCephalochordata because the pharyngeal gill slits, notochord, and buccal cirri are characteristic structures of species in the chordate phylum, specifically in the class Cephalochordata. The incorrect answers do not correspond to the structures mentioned in the question.

The correct answer explains the specific differences between adult tunicates and adult lancelets in terms of chordate characteristics.

The pharyngeal gill slits, notochord, dorsal hollow nerve cord, muscle segment, and gonad are characteristics of the subphylum Cephalochordata within the phylum Chordata, which includes organisms like lancelets and amphioxus.

The correct answer is CnidariaHydrozoa because Cnidaria is the phylum to which hydras, jellyfish, and sea anemones belong, whereas Hydrozoa is a class within the phylum Cnidaria.

Chordata is the correct phylum and Chondrichthyes is the correct class. Members of this class are distinguished by features such as jaws, paired fins, and cartilaginous skeletons. Arthropoda:Insecta have exoskeletons and six legs, Mollusca:Cephalopoda have tentacles and ink sacs, and Porifera:Demospongiae have spicules and are filter feeders.

The correct answer is ChordataActinistia lobe-finned fish with homologous bone structures to tetrapod that were once believed to be extinct. The incorrect answers are: 1. Mollusca:Gastropoda:Radula for feeding - Mollusca is a different phylum and Gastropoda is a class within that phylum known for its unique feeding structure called radula. 2. Arthropoda:Insecta:Adults have six legs - Arthropoda is a different phylum and Insecta is a class within that phylum characterized by having three pairs of legs as adults. 3. Annelida:Polychaeta:Presence of parapodia for locomotion - Annelida is a different phylum and Polychaeta is a class within that phylum known for its locomotory structures called parapodia.

In coral, the soft part is called a polyp, which is part of the class Anthozoa in the phylum Cnidaria. The other incorrect options refer to different phyla and classes that do not encompass corals or their soft parts.

Insects have three main body parts: the head, thorax, and abdomen. These parts serve different functions in the insect's body and are essential for their survival and well-being.

The correct answer refers to the characteristics and functions of specific structures in Platyhelminthes of the class Turbellaria. The incorrect answers provide structures and functions from other phyla or classes, illustrating the diversity of features found in different organisms.

The correct answer links the phylum 'Chordata' and class 'Mammalia' to the organ 'Kidney' in the organ system 'Excretory'. The incorrect answers provide different phylum, class, organ, and organ system combinations that do not match the given organs.

The correct structure and function provided in the answer describes how the radula in MolluscaGastropoda or Polyplacophora is used by some feeding mollusks to scrape algae off rocks. The incorrect answers are other examples of structures and their functions in different phylum and class combinations to test the understanding of the topic.