CSCC Study Final Exam 3 Questions & Answers 2024/2025

CSCC Study Final Exam 3 Questions & Answers 2024/2025 Phylum of Parazoa and etc - ANSWERSPorifera = pore bearing = sponges with no tissues Sessile adults, mostly marine Asymmetrical or Radial symmetry Sponge morphology voacb - ANSWERSspongocel, choanocytes, mesohyl, amoebocytes Spongocel, osculum, ostium - ANSWERScentral cavity of the sponge, large opening, pores choanocytes - ANSWERScollared cells; flagellated, line the spongocel and beat in unison and move water towards the top osculum; water goes in through the pores with food that may or may not be good to eat o Line the spongocel; water enters the pores by the beating action of the flagella o Trap and eat small particulate matter and tiny plankton Mesohyl - ANSWERSin between epithelium and spongocel; calcium carbonate or glass with spicules and amoebocytes; gelatinous, protein-rich matrix Amoebocytes - ANSWERSform spicules and distribute food to the epithelial cells; within the matrix, mobile cells, absorb food from choanocytes, digest it, and carry the nutrients to other cells spicules - ANSWERSneedle-like structures that are usually made of silica and form lattice-like skeletons in sponges, possibly helping to reduce predation spongin - ANSWERSa tough protein that lends skeletal support to a sponge • Produce toxins to help them not be fed upon