Concepts of Biology
1st Edition
ISBN: 9781938168116
Author: Samantha Fowler, Rebecca Roush, James Wise
Publisher: OpenStax College
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Textbook Question
Chapter 15, Problem 3ACQ
Figure 15.33 Which of the following statements about common features of chordates is true?
a. The dorsal hollow nerve cord is part of the chordate central nervous system.
b. In vertebrate fishes, the pharyngeal slits become the gills.
c. Humans are not chordates because humans do not have a tail.
d. Vertebrates do not have a notochord at any point in their development; instead, they have a vertebral column.
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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 15 Solutions
Concepts of Biology
Ch. 15 - Figure 15.3 Which of the following statements is...Ch. 15 - Figure 15.24 Which of the following statements...Ch. 15 - Figure 15.33 Which of the following statements...Ch. 15 - Which of the following is not a feature common to...Ch. 15 - Which of the following does not occur? a. radially...Ch. 15 - The large central opening in the poriferan body is...Ch. 15 - Cnidocytes are found in _____. a. phylum Porifera...Ch. 15 - Cubozoans are______. a. polyps b. medusoids c....Ch. 15 - Which group of flatworms are primarily external...Ch. 15 - Crustaceans are _____. a. ecdysozoans b. nematodes...
Ch. 15 - A mantle and mantle cavity are present in _____....Ch. 15 - Annelids have a ______. a. pseudocoelom b. a true...Ch. 15 - Echinoderms in their larval state have ______. a....Ch. 15 - The circulatory fluid in echinoderms is _____. a....Ch. 15 - Which of the following is not a member of the...Ch. 15 - Members of Chondrichthyes differ from members of...Ch. 15 - Squamata includes _____. a. crocodiles and...Ch. 15 - Sudoriferous glands produce______. a. sweat b....Ch. 15 - Which of the following is a Monotreme? a. kangaroo...Ch. 15 - How are specialized tissues important for animal...Ch. 15 - Using the following terms, explain what...Ch. 15 - Describe the feeding mechanism of sponges and...Ch. 15 - Compare the structural differences between...Ch. 15 - Speculate as to what advantage(s) a complete...Ch. 15 - Describe a potential advantage and disadvantage of...Ch. 15 - Describe the morphology and anatomy of mollusks.Ch. 15 - Sessile adult tunicates lose the notochord; what...Ch. 15 - During embryonic development, what features do we...Ch. 15 - What can be inferred about the evolution of the...Ch. 15 - Explain why frogs are restricted to a moist...Ch. 15 - Describe three adaptations that allow for flight...
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