Biology 1407 Exam 4-Delgado Study Guide with Complete Solutions

Biology 1407 Exam 4-Delgado Study Guide with Complete Solutions Animals are.. - Answer️️ --multicellular (without cell walls) -heterotropic -develop from embryonic layers -ingestive Only Animals have.. - Answer️️ --nerve cells -muscle cells Gastrulation - Answer️️ -formation of distinct layers of embryonic tissue that eventually develop into distinct body parts metamorphosis - Answer️️ -transforming of sexually immature larva into an adult homeobox - Answer️️ -is a DNA sequence within genes that involve the regulation of patterns of anatomical development. Hox genes - Answer️️ -control the expression of genes that influence animal morphology (sponges are simple animals that do not have Hox genes) ©SOPHIABENNET@2024/2025 Thursday, August 22, 2024 1:01 AM DELGADO COMMUNITY COLLEGE 2 Ancestors of animals... - Answer️️ -diverged from ancient fungi, between 675 million and 800 million years ago, believed to be a suspension feeder similar to Choanoflagellates Choanoflagellates - Answer️️ -suspension feeder similar to animalia's common ancestor 4 distinct periods of evolution - Answer️️ --neoproterozoic era -paleozoic era -mesozoic era -cenozoic era Neoproterzoic Era - Answer️️ --1 billion to 542 million years ago -known as Ediacara biota, aren't closely related to today's sponges, alga, or animals. Paleozoic Era - Answer️️ --542-251 million years ago -Contained Cambrian Explosion -Cambrian period, Ordovician period, Silurian period, and Devonian period -Fish became top predators, arthropods became terrestrial, amphibians and amniotes developed on land. Cambrian period - Answer️️ --led to first arthropods, chordates, and echinoderms ©SOPHIABENNET@2024/2025 Thursday, August 22, 2024 1:01 AM DELGADO COMMUNITY COLLEGE 3 -animals adapted to have hard, mineralized skeletons Mesozoic Era - Answer️️ --251-65.5 million years ago -coral reefs formed, birds evolved, and some reptiles returned to water as predators -the first mammals (tiny) arose Cenozoic Era - Answer️️ --65.5 million years ago to present -mass extinctions (goodbye dinosaurs) -mammals grew in size and diversity to accommodate new ecological niches Body Plan - Answer️️ --a set of morphological traits inte