Recent Attempt

Option C) Catfish is the right response to the question, according to the justifications given. Catfish larvae are somewhat similar to chordate larvae.

Mammals are members of the kingdom Animalia’s class Mammalia, where the mother’s mammary glands produce milk for the newborns. All of the subclasses of Mammalia—Prototheria, Metatheria, and Eutheria—have mammary glands.

Diploblastic organisms can be cut radially from numerous planes of symmetry and only have two layers of embryonic tissue: endoderm and ectoderm.

Trochophores, also known as trochospheres, are tiny, translucent, free-swimming larvae that are typical of marine annelids and the majority of mollusk groups. They are frequently formed during the annelida’s life cycle.

Animals with radial symmetry, like diploblastic coelenterates, are classified as Grade Radiata.

OPTION A: A shark’s heart is composed of two chambers: the ventricle and the atrium, sometimes referred to as the auricle. A whale’s heart is composed of four chambers. Two ventricles and two auricles are present. Therefore, choice A is the right one. The distinction between a shark and a whale is accurate in OPTIONS B, C, and D….

The class Osteichthyes includes the order Dipnoi, commonly known as the lungfish, which has both gills and lungs for breathing.

Diploblastic, The response that is correct is “d) Diploblastic.” The ectoderm and the endoderm are the two main germ layers that animals of the grade Radiata have during embryonic development because they are diploblastic. The adult organism’s different tissues and structures are derived from these two layers. The diploblastic body organization of phyla like Cnidaria (e.g., jellyfish, corals) and Ctenophora (comb jellies) is a characteristic of the Radiata grade.

Most fish have scales covering their skin. Sharks and rays have placoid scales, lungfishes and some fossil fish have cosmoid scales, bichirs, bowfins, paddle fishes, gars, and sturgeons have ganoid scales, and the majority of bony fish have cycloid and ctenoid scales. Scales or scutes are also present on reptilian skin. The epidermis forms scales, which are composed of keratin. They can be elaborately modified, like in snakes, or ossified or tubercular, like in lizards.

Because of their gills and lungs, amphibians can survive on land as well as in water.

When compared to the ovum, the sperm is smaller. True animal traits include A, B, and C.

Mammals are distinguished by their hair. The majority of mammals cover some or all of their bodies with hair or fur. This characteristic sets them apart from other animal species.

Flatworms, or platyhelminthes, lack a true excretory system with specialized cells. To get rid of metabolic wastes, they instead rely on simple diffusion across their body surface. The flattened shape of flatworms’ bodies facilitates effective gas and nutrient exchange across their surface, but it also makes it simple for waste materials to escape their bodies and enter the surrounding environment. This is made possible by the relatively simple body plan of flatworms and their high surface area-to-volume ratio, which facilitates effective gas and nutrient diffusion. Certain flatworms have specialized flame cells that aid in controlling the water and salt balance in their bodies in addition to basic diffusion.

Polyps are absent from the calcarea group. Sponge members belong to the phylum Porifera, which includes the Calcarea subclass. The phylum Cnidaria, which includes anthozoans, hydrozoans, and scyphozoans—all of which have polyp and/or medusa body forms—does not include sponges. For instance, corals and sea anemones, which have a polyp body form, belong to the class of cnidarians known as anthozoans. Both polyp and medusa body forms are present in hydrozoans and scyphozoans at various phases of their life cycles.

The circulatory system is the one that is not segmentally organized in annelids (option c). These organisms frequently display segmental repetition in other systems, such as the neurological, excretory, and digestive systems.

d) The “giant Antarctic sponge,” or Scolymastra joubini, is a type of sponge that inhabits the waters surrounding Antarctica. It can reach a height of several meters and is in fact more than a meter tall.

In its pure state, chitin is tough and translucent, but it also joins forces with other substances to create a robust outer layer. For instance, it combines with proteins in arthropods and with calcium carbonate in crustaceans. This substance gives the shells and exoskeleton their stiffness, toughness, and hardness.

The phylum Annelida is home to the most prevalent marine worms. The tiny rings or segments that comprise their bodies are what set them apart. Polychaetes are the most prevalent marine annelids. Neries is a member of the polychaetes class.