Answer questions 1-10 as True or False True A False- B ) Sponges have true tissu
ID: 275576 • Letter: A
Question
Answer questions 1-10 as True or False True A False- B ) Sponges have true tissues. 2) 3) Radial symmetry exists where there is only one way to split the animal into equal halves. 4) Members of the phylum Chordata have bilateral symmetry 5) Invertebrates are animals without backbones. Bilateral symmetry refers to animals that are identical all around a central axis. 6) The food trapping cells of sponges are called Choanocytes 7) Cnidarians are characterized by stinging cells used for defense and for capturing prey 8) All Humans are vertebrates 9) Gastro vascular cavity is a central digestive compartment 10) All animals are able to digest their food within their bodies. with only one opening Match the following animals with corresponding Phyla 11-15 a. Porifera b. Caldaria e. Platyhelminthes d. Nematoda e. Annelida decomposers, and dangerous parasites in plants, humans, and oher animals 12) Earthworms, leaches: have body segmentation, a subdivision of the body along its length into a series of repeated parts. 13) Flatworms: parasites or free-living in marine, freshwater, or damp habitats 14) Sponges: are aquatic stationary multicellular animals I5) Sea anemone, jellies, and hydras: their body plan has two variations called alternations generations. Match the following animals with corresponding Phyla 16-19 a. Mollusca b. Arthropoda e. Echinodermata d. Chordata 16) Sea star, sea urchins, sea cucumber etc.: have an endoskeleton, and a water vascular system that facilitates movement and gas exchange 17) Reptiles, birds, amphibians etc.: backbone and segmental muscles. 18) Sea slugs, octopus, squid etc.: represented by soft-bodied animals and usually have no shells, one shell, or two shells. 19) Insects, crustaceans, spiders etc.: The body is completely covered by an exoskeletor. Match the following animals with corresponding Subphyla 20-21 a. Vertebrata 20) sea squirts (tunicate), salps, and ascidians 21) lancelets b. Urochordata e. Cephalochordata 22) All Chordates share key features that appear in the embryo and sometimes the adult: A dorsal, hollow nerve cord a. d. b, A notochord, c, Pharyngeal slits All of the above e. None of the above 23) The pulmonary circuit carries blood between the heart and the rest of the body. a. True b. False 24) The systemic circuit carries blood between the heart and lungs. a. True b. FalseExplanation / Answer
1. False. sponges have aggregates of different cell types but lacks true tissues and organs.
2. False. bilateral symmetry refers to division of an organism into two identical halves by a central plane.
3. False. Radial symmetry refers to symmetry of an organism around a central point.
4. True. Members of the phylum chordata can be divided into two equal halves and hence possess bilateral symmetry.
5. True. invertebrates does not possess a vertebral column or a backbone.
6. True. Choanocytes are cells having a central flagellum, that beats regularly and traps food particles, which is then phagocytosed by the sponge cell.
7. True. Cnidarians consists of cnidocytes, that helps in capturing prey.
8. True. humans possess a vertebral column and comes under the sub-phylum vertebrata.
9. True. Gastrovascular cavity in cnidarians also known as blind gut that consists of a common orifice through which food enters and waste products exists out.