Cambrian explosion - Study guides, Class notes & Summaries

Biology 1402 Questions and Answers Already Passed What is a feature of Animals, but is not seen outside of the animal kingdom? They have collagen in their extracellular matrix. Phylogenies based on morphology and phylogenies based on molecular data disagree on which one of the following issues? whether the appearance and type of coelom is important in interpreting phylogeny A horshoe-shaped crown of tentacles used by many invertebrates for feeding is called a lophophore Which ...

ASU BIO 182 Exam 3 Latest Update Graded A+ biodiversity the variety of life in the world or in a particular habitat or ecosystem Cambrian explosion animal body plans evolved in a brief period carrying capacity the number of people, other living organisms, or crops that a region can support without environmental degradation Coevolution reciprocal evolution of two or more species. single species evolves in response to another group of species colonization Invasion of new region...

Scientific theories are just "ideas" (T/F) Answer> false What is NOT considered a quality within the definition of life? Living things evolve Living things can grow and develop Living things are sentient Living things use energy Answer> Living things are sentient In some cases an observational study is more appropriate than an experiment. (T/F) Answer> True The oldest fossils humans have discovered are from organisms called________. Answer> stromatolites Extant mea...

What are stromatolites? - rocks formed by the accumulation of sedimentary layers on bacterial mats What are stromatolites? - rocks formed by the accumulation of sedimentary layers on bacterial mats When was the oxygen revolution? - 2.7-2.3 bya Oldest Eukaryotes - 1.8 billion years ago Oldest fossil of a multicellular eukaryote - 1.6 billion years ago What is a protist? - polyphyletic group of unicellular eukaryotes when was the earliest direct evidence of life, and where was it...

PNB 2250 Exam Practice Questions and Answers How are plant cells held together? - Ans:-Plasmodesma Plasmodesma - Ans:-Flow of nutrients between cells How are animal cells held together? - Ans:-Tight junctions Tight junctions - Ans:-Unique connections for animal cells 2 absolute requirements of animals: - Ans:-1. Control Systems 2. Distribution Systems True/False: gene number is proportional to physical structure or complexity - Ans:-FALSE - it is NOT proportional Which fossils do we fi...

Species - group of individuals with the potential to interbreed and produce viable offspring *some asexual organisms are recognized as species although they do not breed. archaebacteria - microorganisms that are similar to bacteria in size and simplicity of structure, but radically different in molecular organization. now believed to constitute an ancient intermediate group between the bacteria and eukaryotes prokaryote - a single celled organism that has neither a distinct nucleus with a m...

What is the goal of bioremediation? - To clean up areas polluted with toxic compounds using bacteria Broad-spectrum antibiotics inhibit the growth of most intestinal bacteria. Consequently, assuming that nothing is done to counter the reduction of intestinal bacteria, a hospital patient who is receiving broadspectrum antibiotics is most likely to become - deficient in certain vitamins and nutrients If prokaryotes did not exist, what would change in the nitrogen cycle? - The rate of movement ...

Env-201 Exam 2 Questions & Answers 2023/2024 What are fossils? - ANSWER-preserved remains of ancient organisms; evidence of very ancient past life What conditions favor fossil formation? - ANSWER-- special material (amber) - tar pits - frozen env - deserts - covered in bodies of water w/ silt What body parts are msot likely to fossilize? - ANSWER-Bones, exoskeleton, teeth, scales, shells, "hard parts" What is a "living fossil"? - ANSWER-Species first discovered as a fossil ...

Earliest life forms trace back to - ANSWER-4 billion years ago Earth's early atmosphere - ANSWER-Reducing and lacked oxygen A.J Oparin's hypothesis - ANSWER-Earth's reducing atmosphere plus cooling and lightning storms resulted in primordial soup where organic molecules could be formed S. Miller and H. Urey's experimentation - ANSWER-Water paired with methane and ammonia gas and created a spark; when cooled, the mixture produced amino acids S. Fox experiment - ANSWER-Amino acids ...

WSU Biology 106 Exam 3 Questions With 100% Verified Answers. Arthropods - answerPhyla with greatest amount of diversity with 85% of animal spp 700 million years ago - answerWhen the first animals originated Porifera (sponges) - answerPhyla with no tissues, muscles, nerves, or specialized organs Choanocytes - answerFlow of water and food acquisition in sponges Amoebocytes - answerFound in sponges, these cells are mobile and perform numerous functions, including reproduction, transport of f...