EBK LIFE: THE SCIENCE OF BIOLOGY
11th Edition
ISBN: 8220103935432
Author: Sadava
Publisher: MAC HIGHER
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Chapter 26.4, Problem 2R
Summary Introduction
To review:
The roles of dinoflagellates in coral bleaching and the generation of red tides.
Introduction:
Dinoflagellates are marine photosynthetic eukaryotes. Their chloroplasts appear golden brown due to the presence of a mixture of accessory and photosynthetic pigments. Some species are endosymbionts that live within the cells of corals, an invertebrate animal and impart them golden or greenish color.
Endosymbiotic dinoflagellates supply the corals with nutrients produced from photosynthesis and, in turn, the corals provide them with photosynthetic substrates. This endosymbiotic relationship is responsible for the color of the corals. These protozoans, dinoflagellates also produce red tides in the ocean.
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The Snapdragon is a popular garden flower that comes in a variety of colours, including red, yellow, and orange. The genotypes and associated phenotypes for some of these flowers are as follows:
aabb: yellow
AABB, AABb, AaBb, and AaBB: red
AAbb and Aabb: orange
aaBB: yellow
aaBb: ?
Based on this information, what would the phenotype of a Snapdragon with the genotype aaBb be and why?
Question 21 options:
orange because A is epistatic to B
yellow because A is epistatic to B
red because B is epistatic to A
orange because B is epistatic to A
red because A is epistatic to B
yellow because B is epistatic to A
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.
Chapter 26 Solutions
EBK LIFE: THE SCIENCE OF BIOLOGY
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