Q1.Which phylum contain acoelomic and triploblastic animals?
Answer : Option CExplaination / Solution:
Those animals in which the developing embryo has a three germinal layer, mesoderm in between the ectoderm and endoderm, are called triploblastic animals and absence of internal body cavity is called as acoelomic.
Q2.Choose the odd one out based on coelom: Annelids, Molluscs, Platyhelminthes, Arthopods
Answer : Option BExplaination / Solution:
Animals possessing coelom are called coelomates such as annelids, molluscs, arthropods, echinoderms, hemichordates and chordates.In Platyhelmites coelom is absent.
Answer : Option DExplaination / Solution:
In coelenterates, the arrangement of cells is more complex. Here, the cells performing the same function are arranged into tissues, hence is called tissue level of organisation.
Q4.The cross-section of the body of an invertebrate is given below. Identify the animal which has this body plan.
Answer : Option DExplaination / Solution:
In some animals, the body cavity is not lined by mesoderm, instead, the mesoderm is present as scattered pouches in between the ectoderm and endoderm. Such a body cavity is called pseudocoelom and the animals possessing them are called pseudocoelomates, e.g.,aschelminthes such as round worm.
Answer : Option AExplaination / Solution:
Arthropoda is the largest phylum of kingdom animalia. It includes all insects, arachnids, myriapods and crustaceans. They are characterized by jointed limbs and cuticles.
Answer : Option CExplaination / Solution:
The animals of class Mammalia have seven cervical vertebra and four chambered heart. Mammalian are charecterised by presence of mammary gland to feed their young ones.
Answer : Option DExplaination / Solution:
Alimentary canal is absent in Taenia solium. Taenia solium is a obligate parasite and obtain digested food from small intestine of human being as well as pigs. Pick the animals with true placenta
Answer : Option CExplaination / Solution:
True placenta is present in Mongoose. Placenta help in transfer of nutrients and respiratory gases from mother to growing foetus.