Animal Kingdom Xi Bio

Arthropoda is the correct answer because it is the largest phylum in the animal kingdom, both in terms of the number of species and individuals. Arthropods include insects, spiders, crustaceans, and other organisms, and they are incredibly diverse and abundant in various habitats worldwide. Their success can be attributed to their ability to adapt to different environments and their efficient reproductive strategies.

Morphology is the correct answer because it is the science that deals with the study of external form, size, color, structure, and relative position of various parts of an organism. It focuses on the physical characteristics and appearance of organisms, including their shape, arrangement of body parts, and overall structure. Anatomy also deals with the study of the structure of organisms, but it specifically focuses on the internal structure and organization of body parts. Entomology is the study of insects, and histology is the study of tissues.

The correct answer is Dog. The first animal to go into space was a Soviet space dog named Laika. She was launched aboard the spacecraft Sputnik 2 on November 3, 1957. However, it is important to note that Laika did not survive the mission as there were no plans for a safe return to Earth at that time. Her sacrifice paved the way for human space exploration.

Plankton are the correct answer because they are the primary producers in the ocean's food chain and form the base of the food web. They are consumed by a wide range of organisms, including fish, aquatic insects, and other larger creatures. Therefore, all the creatures on the ocean's surface, whether directly or indirectly, rely on plankton as a food source.

In coelomates, the body cavity is lined by mesoderm. Mesoderm is one of the three primary germ layers in the developing embryo, and it gives rise to various structures including muscles, bones, connective tissues, and the lining of the body cavity. The mesoderm forms a protective layer around the internal organs, providing support and allowing for movement. This lining helps to separate the organs from the outer body wall and other structures, maintaining their position and preventing friction between them.

Round worms (Aschelminthes) are pseudocoelomates. Pseudocoelomates have a body cavity called a pseudocoelom, which is not completely lined by mesoderm. Round worms have a pseudocoelom, which is a fluid-filled body cavity that is not fully lined by mesoderm. This distinguishes them from coelomates like flat worms (Platyhelminthes), which have a true coelom, a body cavity completely lined by mesoderm. Molluscs are acoelomates, meaning they lack a body cavity, and insects are also pseudocoelomates, like round worms.

Nematheiminthes, also known as roundworms, are the majority members of the phylum that are parasitic. They are known to infect a wide range of organisms including humans, animals, and plants. These parasites can cause various diseases and health issues in their hosts. Unlike other phyla mentioned in the question, such as Mollusca, Annelida, and Echinodermata, which have both parasitic and non-parasitic members, Nematheiminthes are predominantly parasitic in nature.

Schizocoelomates and enterocoelomates are both examples of true coelomates. A true coelom is a body cavity that is completely lined by mesoderm tissue. In schizocoelomates, the coelom forms by splitting of the mesoderm, while in enterocoelomates, it forms as outpocketings of the archenteron. Both of these groups have a true coelom, distinguishing them from acoelomates, which lack a body cavity, and from endoderms only, which would only have an endoderm-lined cavity.

The true coelom, a fluid-filled body cavity completely lined with mesoderm, appeared first in annelida. Annelids are a phylum of segmented worms that have a well-developed coelom. This body cavity provides support, protection, and a space for organs to function efficiently. The presence of a true coelom is considered an advanced characteristic in evolution, and annelids were one of the early groups to develop this feature. Therefore, annelida is the correct answer.

The postanal tail is a distinguishing feature of chordates, which is not found in nonchordates. This tail is present in the embryonic stage of chordates and may persist in some species into adulthood. It is a muscular structure located posterior to the anus and is involved in locomotion and balance. Nonchordates, on the other hand, do not possess this unique tail structure.

The uricotelic mode of passing out nitrogenous wastes refers to the excretion of uric acid as the main nitrogenous waste product. This mode of excretion is found in reptiles and birds. Uric acid is a semi-solid waste that requires less water for its excretion, making it suitable for organisms that have limited access to water, such as reptiles and birds. This mode of excretion helps in conserving water and reducing the risk of dehydration in these animals.

Karyotaxonomy is the modern branch of classification that is based on the number of chromosomes. This means that organisms are classified and organized based on the specific number of chromosomes they possess. This is an important factor in determining the relationships and evolutionary history of different species. By studying the number of chromosomes, scientists can gain insights into genetic variations and patterns of inheritance.

The correct answer is moliusca because haemocyanin is a copper-based blood pigment that is found in the circulatory system of mollusks. This pigment is responsible for transporting oxygen throughout the body of mollusks.

The character that differentiates chordates from non-chordates is the presence of a dorsal tubular nerve cord. This nerve cord is located along the dorsal (back) side of the body and serves as the main pathway for transmitting nerve impulses. Non-chordates, on the other hand, do not possess this specific feature. The presence of a dorsal tubular nerve cord is a defining characteristic of chordates and sets them apart from other animals.

The non-cellular layer present between the pinacoderm and choanoderm in the body wall of poriferans is known as mesenchyme. Mesenchyme is a gelatinous matrix that contains various types of cells, including amoebocytes and sclerocytes. It provides structural support to the sponge and helps in the transportation of nutrients and waste products. This layer is important for the functioning and organization of the sponge's body.

Kanha National Park is located in Madhya Pradesh and is famous for its tiger population. Madhya Pradesh is known for its rich biodiversity and is home to several national parks and wildlife sanctuaries. Kanha National Park is one of the largest and most well-known tiger reserves in India, providing a natural habitat for these majestic creatures. The park is renowned for its successful conservation efforts and is a popular destination for wildlife enthusiasts and photographers.

The correct answer is A alone is wrong. This is because statement A states that the circulatory system in arthropods is of closed type, which is incorrect. Arthropods have an open circulatory system, where the blood is not confined to blood vessels and flows freely through the body cavity.

The specific name "Canis familiaris" is correct because it follows the binomial nomenclature system used in taxonomy. In this system, the specific name is the second part of a species' scientific name and is always written in lowercase. "Canis familiaris" refers to the domestic dog, which is a well-known and widely recognized species. The other options do not follow the correct format for specific names or do not represent valid species.

The correct answer is "structure of nucleus." In the five kingdom system, the main basis of classification is the structure of the nucleus. The nucleus is a membrane-bound organelle that contains the genetic material of the cell. The structure of the nucleus can vary among different organisms and is used to categorize them into different kingdoms. This classification is important as it helps scientists understand the evolutionary relationships and characteristics of different organisms.

The antennal gland in a prawn functions as an excretory organ. This gland helps in removing waste products from the body and maintaining the osmotic balance. It filters the blood and removes nitrogenous waste in the form of ammonia. Therefore, prawns use their antennal gland to excrete waste and maintain homeostasis in their bodies.

Tapeworms belong to the group Cestoda. Cestoda is a class of parasitic flatworms that have a long, segmented body. Tapeworms are characterized by their ability to attach themselves to the intestines of their hosts and absorb nutrients from them. They are known for their distinctive ribbon-like appearance and can cause various health issues in animals and humans.

Binomial nomenclature, the system of naming species using two Latin words (genus and species), was first used in the book "Histoire Natureae."

Cephalization refers to the evolutionary process where organisms develop a distinct head region with sensory organs and a centralized nervous system. Lateral symmetry, on the other hand, is the arrangement of body parts in a way that they are mirrored on both sides of a central axis. The correct answer, cephalization, is the most logical choice as it is the only option that is related to the development of a distinct head region, which is not directly associated with lateral symmetry. Neoteny refers to the retention of juvenile characteristics in adult organisms, metamorphosis is the process of transformation from one stage to another, and metamerism refers to the repetition of body segments.