PiNamePRE-LAB 13thispageforAdditional InformationEADE▪ https://openstax.org/details/books/biology-2eChapter 27: Introduction to Animal DiversityChapter 28: InvertebratesChapter 29: VertebratesPart A: Biodiversity III: Diversity of AnimalsAnswer the following questions.1 What are the key features of animals?https://www.thoughtco.com/the-main-animal-characteristics-4086505a.b.C.2 What two animal phyla have true radial symmetry?3 What are the two major groups of animals in Bilateria (with bilateral symmetry)?4 What are the three tissue layers in animals with bilateral symmetry?5 What are the two distinct clades of protostomes?6 What are the two phyla of deuterostomes?losinebt 0a 159Ho coe

Biodiversity is important for an ecosystem to work properly. Proper functioning of ecosystem leads to nutrient cycling, soil fertilization, balance in food chain, disease regulation, etc. and disturbance in any of these factors would break the equilibrium of the ecosystem. Note: According to the company guidelines, only first three sub-parts are to be answered. Hence, kindly post the remaining questions separately. 1. Almost all the animals are eukaryotic and multicellular, having specialized tissues. Most animals are motile as they are heterotrophic and require source of food in order to survive and develop. They may also consume living or dead organic matter according to their need. Their mode of reproduction can be either sexual or asexual. Simple animals like planarians carry out asexual reproduction whereas higher animals reproduce sexually. 2. Radial symmetry is a form of symmetry where cutting through the central axis in every direction would result in identical parts. The two animal phyla with true radial symmetry includes the cnidarians and the echinoderms. 3. Bilateral symmetry is a form of symmetry where the external appearance is same on left and right sides of the body or opposite sides are similar in a sagittal plane. The two major groups with bilateral symmetry, also known as Bilateria are protostomes and deuterostomes.