WHAT IS LIFE LL WITH 1 TERM ACCESS
5th Edition
ISBN: 9781319438920
Author: PHELAN
Publisher: MAC HIGHER
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Chapter 26, Problem 1SA
Summary Introduction
To analyze:
Why asexual reproduction is not ideal in a changing environment.
Introduction:
Asexual reproduction does not require a partner, and all offspring are genetically identical to the parent.
Expert Solution & Answer
Explanation of Solution
One major difference between sexual and asexual reproduction is that the offspring are genetically varied in sexual reproduction, while they are genetically identical in asexual reproduction. In a changing environment, when there is genetic diversity, there are higher chances that at least one of the individuals has a genotype that will allow it to adapt to the changes and survive. However, in the case of asexual reproduction, the chances for
Conclusion
In asexual reproduction, the offspring are genetically identical to the parent. Rich genetic diversity is not created in the population. This means that there are lesser chances for the occurrence of genotypes that will be able to adapt to and survive in a changing environment. This makes asexual reproduction less than ideal, in a changing environment.
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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 26 Solutions
WHAT IS LIFE LL WITH 1 TERM ACCESS
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