Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN: 9780134580999
Author: Elaine N. Marieb, Katja N. Hoehn
Publisher: PEARSON
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2-Explain why Whittaker’s 5-domain system was changed to three domains in the 1990’s
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- Explain the dataarrow_forwardThe "RNA world hypothesis"... maintains that RNA originally served as the main energy source of cells and gradually evolved to have a genetic function. Ospeculates there was a time in earth's history when RNA served both as rudimentary genetic material and the primary catalyst of life. Ohypothesizes that RNA viruses were the first life forms and later evolved into DNA based microbes assumes RNA was a key ingredient in the first primitive membranes that formed protobionts. Later, it migrated inside of "proto-cells" and took on a hereditary function. has largely been discredited by most researchers studying the origins of life on earth. It is now widely believed that DNA preceded RNA.arrow_forward2. The Six Kingdoms How do we group organisms into kingdoms? Organisms are grouped in kinedoms based on 5 different characteristics: AALIA FUNG iouer arytic PLANTA e ryaticd PROTISTA war mutioelia Bubary 1. 2. Cell structures 3. Number of cells EUBACTERIA nicellar prokaryotic ABCHASBACTERIA der, prokaryoti 4. Mode of 5. Motile or non-motile Characteristics of the Six Kingdoms Nutrition Mobility Examples Domain Kingdom Cell Type Cell Structure # of Cells Some Bacteria Eubacteria Prokaryote unicellular can move Archaea Archaebacteria Cell walls Autotroph or Methanogens, without heterotroph halophiles peptidoglycan Protista Most unicellular, Some Eukaryote some can colonial, move some multi Plantae Cell walls of cellulose. Mosses, ferns, autotroph Contain flowering plantsarrow_forward
- ige Cc Performance Matters Welcome, Ranike Wizzart! Question 15 of 21 - PO Mte Cpanobacterum Ancestral Preharyete Ifeldng pleama membrane deeymbleale Aneestrel haryote ow did the development of Margulis' theory aid in our understanding of how complex organisms came into existence? O It provided an explanation as to why prokaryotic cells do not have a nucleus. O It provides an explanation as to why bacteria and mitochondria are similar in size. D It provides an explanation of how life today could have originated from a single cell. D It provides an explanation of how prokaryotic and eukaryotic cells use oxygen to work.arrow_forwardAccording to Lynn Margulis's theory of endosymbiosis, bacteria entered large cells either as parasites or as undigested prey as illustrated. All the following are proof that mitochondria and chloroplast evolved from bacteria, except: Endosymbiosis in a nutshell: 1. Start with two 2. One bacterium engulfs the other. 3. One bacterium now lives inside the other. independent bacteria. 4. Both bacteria benefit from the arrangement. 5. The internal bacteria are passed on from generation to generation. O a they each have a double membrane they have chromosomes similar in shape to their host they are the size of bacteria their DNA is different from its hostarrow_forwardkindly refer to the photo attached, thank you.arrow_forward
- 9:02 7 <14 Do novw 12/13/21 7:41 PM СМАС O OO Broth without contamination Organisms grew Write as many observations and inferences about the diagram In terms of the cell theory . What did Pasteur's experiment prove ? A) all organisms are composed of cells B)Cells are the basic unit of life C) All cells come from pre-existing cells. claim evidence What is spontaneous generation?. How did Pasteur's experiment disprove spontaneous generation? answerarrow_forwardThe two answer choices are: 1. Eukarya 2. Bacteriaarrow_forwardWhat techniques can we use here? Genetics? Morphology? Biological Concept? or the coloration of the picture?arrow_forward
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