ACHIEVE FOR BIOLOGY:HOW LIFE WORKS-EBOOK
3rd Edition
ISBN: 9781319284367
Author: Morris
Publisher: Macmillan Higher Education
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Chapter 24.5, Problem 11SAQ
Summary Introduction
The size and shape of microorganisms are immediately revealed upon examination using a microscope. Among Archaea, several different morphologies are found. Archaeal cells vary in size ranging from 0.2 µm to >700 µm in diameter. In general, the size of rod-shaped cells ranges from 0.5 – 4 µm in width and <15 µm in length. Archaeal cells are prokaryotes and they do not possess a membrane-bound nucleus. Their genes are arranged in the form of a single circular chromosome.
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- Why are archaea commonly referred to as extremophiles?arrow_forwardIf all prokaryotes were eliminated from the planeta) animals would thrive because there would be no disease.b) archaea would thrive because there would be no competition for nutrients.c) all animals would die.d) animals and archaea would thrive.arrow_forwardWhy is there a debate as to whether archaea is classified as prokaryotic or eukaryoticarrow_forward
- Some prokaryotes, especially archaea, are capable of living in extreme environments, such as deep-sea vents, where temperatures can reach 80°C (176°F). Few organisms can survive at this temperature. What adaptations might archaea possess that allow them to survive in such extreme heat?arrow_forwardWhich of the following organisms would be considered to be an autotroph? A) a yeast B) a mold C) a protozoan D) an algaarrow_forwardMethanogenesis is a metabolic process found only among certain members of domain Archaea. A) O True B) O Falsearrow_forward
- In which environments do bacteria live?arrow_forwardThere are major differences between the bacteria and the archaea but both groups were historically grouped together. i) summarize the similarities between the bacteria and archaea, ii) what are the differences between the two groups that allow us to distinguish them?arrow_forward What were the earliest forms of life on Earth? What was the energy source for the earliest form of life on earth? What are the earliest records of life on Earth? What is able to grow and thrive under conditions that would kill most other organisms (high/low pH, etc)? What are psychrophiles? Describe radioresistant prokaryotes and their habitat preferences. Who developed postulates to identify disease-causing organisms? What percent of bacteria and archaea cannot be cultured? Describe the viable-but-not-culturable state of prokaryotes. Describe planktonic prokaryotes. Why do biofilms form? What holds biofilms together? Structure of Prokaryotes Describe the nucleoid. Describe conjugation. What happens during binary fission? What are cell walls of prokaryotes primarily composed of? What structure of Archaea is different from other domains of life? What is the Bacteria division into two groups based on? Prokaryotic Metabolism Which macronutrient is…arrow_forward
- Which of the following is true regarding the diversity of life ? a) Domain Archaea does not contain any disease-causing organisms. b) Bacteria can vary greatly in size and range up to 700 µm in length Microbial Eukarya may have first arisen two billion years ago, well before fungi, plants c) animal d) All of the above are true 7:33 /arrow_forwardWhy do some microbiologists disagree with classifying bacteria and archaea as “prokaryotes”?arrow_forwardIn comparing bacteria, archaea, and eukaryotes, which statement below among A - D is false? A) O the members of two of these three groups comprise cells that lack a nuclear membrane B) O archaea and eukaryotes share some similarities in the componeents of gene expression C) O having diverse types of metabolism is a feature of the members of archaea and bacteria D) Oa cytoplasmic membrane is a feature shared by all the cells in these three groups E) OA-E are all truearrow_forward
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