Uconn Biology 1108 Exam 3 Study Guide Questions With Solutions 2024

Gastrulation {Ans: The second key developmental process in embryogenesis. The reorganization of the embryo. Form three layers of sheets of cells called germ layers. All tissues and organs are made from these three layers.}Chondrichcytes {Ans: Cartilaginous Fish. aka sharks and rays, entirely predatory}Class Malacostraca {Ans: Crabs, shrimp, lobster, crayfish, woodlice}2nd Trimesters {Ans: Characterized by continued development and growth of the fetus. Fetal movements are usually first felt in this stage.}Matrotrophy {Ans: Direct nourishment of embryo by mother}Kinesis {Ans: Random, undirected movements in response to a stimulus}Porifera {Ans: Sponges; lack organized tissues and guts. Filter feeders, mainly marine, specialized cell types. Bottom dwelling. Most basal metazoan. Are chemically exotic, using chemicals for competitive interactions, and natural pharmaceuticals.}Class Chilopoda {Ans: Centipedes, 1 pair legs a segment, venomous, predators}Hox genes {Ans: regulate development of major features of body form in animals. Similar to DNA sequences and relative positions on chromosomes}Amnion {Ans: a membrane surrounding a fluid filled cavity that allows the embryo to develop in a watery environment. Huge impact on animals abilities to reproduce w/o water.}Parazoans {Ans: The most basal metazoans, consisting of the Subkingdoms Porifera and Placozoa. Have no gut}Biogeochemical