Bio 121 - Lab 6 exam (100% correct and graded A+)

Grantia Characteristics - Eukaryotic Heterotrophic Multicellular Grantia Classification - Domain: Eukarya Kingdom: Animalia Subkingdom: Parazoa Phylum Porifera Common Name: Sponge Grantia Habitat - -Coastline of the North Atlantic -Intertidal regions Grantia Energy/Food Source - -Spongocoel - internal cavity lined with flagellated cells - beating of flagella draws water, fine organic particles & tiny organisms (bacteria) into the spongocoel through tiny pores of the body wall -Food particles are trapped on a layer of mucilaginous material & transported into the cells for digestions -Water & wastes then leave the spongocoel through a large opening, the osculum, at the top of the sponge (filter feeding) Grantia Type of Skeleton - -Their bodies are loose eggregations of a few types of cells and fibrous proteins called spongin and spicules (made of calcium carbonate). Grantia Motility - Sessile - but its larva and sperm move Grantia Adaptations - -Flagellated cells - draw water in to spongocoel - allow nutrition to be obtained -Stalk - attaches it so it doesn't float away-spicules - act as a threat - indigestible Grantia Reproduction - Hermaphroditic: -Sexual - releases sperm into seawater which swim to the egg within other sponges for fertilization. Resulting zygote grows into an embryo within the parent sponge. The embryo develops into a flagellated larva which emerges into the spongocoel and swims out of the osculum. It then swims for a while & then settles into a new colony. -Asexual - gragmentation - if a tube is broken off it can grow into a new colony Sponge Friends - Alpysina Spongilla Hydra Characteristics - Eukaryotic Heterotrophic Multicellular Radial symmetry Diploblastic acoelomate Gastrovascular cavity