are animals asexual or sexual in the animalia kingdom

The original Animal Kingdom proposed by Linnaeus included the protozoans, sponges, jelly fishes, worms, crabs, insects, spiders, snails, starfishes, sharks, bony fishes, frogs, lizards, birds and mammals. In general, animals exhibit the following distinguishing charact..

The Animal Kingdom is divided in several phyla mainly on the basis of the cell organisation, symmetry, presence or absence of notochord and body cavity. Animals are arranged progressively from simple single-celled protozoans to highly complex mammals. Given below are ..

The animal kingdom was initially classified as follows: fig. 7.8 - Classification of Kingdom Animalia..

The Kingdom Protista includes with a few exceptions, all the unicellular eukaryotic micro-organisms. They are predominantly aquatic where they occur as solitary cells. Some of them may form colonies consisting of similar cells. The protists are regarded as ancestors of all multicellular e..

Apart from the asexual and sexual reproductions that form the main form of reproduction in most animals, many deviations in the reproductive strategies are observ..

These are protozoans which occur as endoparasites in different groups of animals. They lack locomotor structures. The body has a tough covering called cuticle and a single nucleus. Asexual reproduction occurs by multiple fission. Sexual reproduction involves anisogamy...

>Binomial nomenclature is the system of giving a scientific name to an animal or a plant. The name consists of two words, the first one referring to the name of the genus and the second to the name of the species. Binomial nomenclature avoids the confusion created by using common names. C..

These are a group of diverse protozoans characterized by the presence fine hair like cilia as locomotor structures. They are aquatic and free living or parasitic forms. Ciliates show a high degree of morphological and physiological specialisation compared to other animal like protistans. ..

. Most of them are saprotrophic. Some are found as parasites on algae and other plants. Slime moulds generally reproduce asexually by fragmentation or by forming sporangia, which produces spores having a cellulose cell wall. Sexual reproduction involves isogamy or anisogamy. fig..

Primitive multicellular animals with cellular grade of organisation. Free living aquatic, mostly marine, sedentary forms either solitary or colonial. Body with a large number of incurrent pores called ostia leading into a spongocoel through a system of canals, Spongocoel opening o..