Loose Leaf For Integrated Principles Of Zoology
18th Edition
ISBN: 9781260411140
Author: Cleveland P Hickman Jr. Emeritus, Susan L. Keen, David J Eisenhour Professor PhD, Allan Larson, Helen I'Anson Associate Professor of Biology
Publisher: McGraw-Hill Education
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Textbook Question
Chapter 1, Problem 1RQ
Why is life difficult to define?
Expert Solution & Answer
Summary Introduction
To determine: The reason for the difficulty in defining life.
Introduction: Life is a characteristic that differentiates living and non-living. All the common characteristics that lie in ancestors, past and present are a part of the concept of life.
Explanation of Solution
The general features of life include chemical uniqueness, reproduction, complexity and hierarchical organization, possession of genetic program, metabolism, development, movement, and environmental interactions. These factors differentiate the living and non-living characteristics and define life. All the characters still have some exceptions, which makes it difficult to define. Example-Body movement is the characteristics of a living thing, but plants do not move, and still, they are living.
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A sample of blood was taken from the above individual and prepared for haemoglobin analysis. However, when water was added the cells did not lyse and looked normal in size and shape. The technician suspected that they had may have made an error in the protocol – what is the most likely explanation?
The cell membranes are more resistant than normal.
An isotonic solution had been added instead of water.
A solution of 0.1 M NaCl had been added instead of water.
Not enough water had been added to the red blood cell pellet.
The man had sickle-cell anaemia.
A sample of blood was taken from the above individual and prepared for haemoglobin analysis. However, when water was added the cells did not lyse and looked normal in size and shape. The technician suspected that they had may have made an error in the protocol – what is the most likely explanation?
The cell membranes are more resistant than normal.
An isotonic solution had been added instead of water.
A solution of 0.1 M NaCl had been added instead of water.
Not enough water had been added to the red blood cell pellet.
The man had sickle-cell anaemia.
With reference to their absorption spectra of the oxy haemoglobin intact line) and deoxyhemoglobin (broken line) shown in Figure 2 below, how would you best explain the reason why there are differences in the major peaks of the spectra? Figure 2. SPECTRA OF OXYGENATED AND DEOXYGENATED HAEMOGLOBIN OBTAINED WITH THE RECORDING SPECTROPHOTOMETER 1.4 Abs < 0.8 06 0.4 400 420 440 460 480 500 520 540 560 580 600 nm 1. The difference in the spectra is due to a pH change in the deoxy-haemoglobin due to uptake of CO2- 2. There is more oxygen-carrying plasma in the oxy-haemoglobin sample. 3. The change in Mr due to oxygen binding causes the oxy haemoglobin to have a higher absorbance peak. 4. Oxy-haemoglobin is contaminated by carbaminohemoglobin, and therefore has a higher absorbance peak 5. Oxy-haemoglobin absorbs more light of blue wavelengths and less of red wavelengths than deoxy-haemoglobin
Chapter 1 Solutions
Loose Leaf For Integrated Principles Of Zoology
Ch. 1 - Why is life difficult to define?Ch. 1 - What are the basic chemical differences that...Ch. 1 - Describe the hierarchical organization of life....Ch. 1 - What is the relationship between heredity and...Ch. 1 - Describe how evolution of complex organisms is...Ch. 1 - Using characteristics of how they obtain...Ch. 1 - Prob. 7RQCh. 1 - What are the essential characteristics of science?...Ch. 1 - Use studies of natural selection in British moth...Ch. 1 - How do we distinguish the terms hypothesis,...
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