BIOLOGY
12th Edition
ISBN: 9781260169614
Author: Raven
Publisher: RENT MCG
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Chapter 54, Problem 1IQ
Summary Introduction
To determine: The difference in the behavior of lizards living in open environment and the lizards in the shaded environment.
Introduction: The horned lizards have flattened body and spikes on head and body which is distinguishable from their ancestors. These spikes help them to defend against predators. The evolution of horned lizard can be explained by Darwin’s theory of natural selection.
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Q26: Please type the answer this question
Salamander larvae basically have a body form similar to the adult-elongated body, tail, and four legs. External gills are present. Fins and balancers are present on some species. Balancers are a pair of organs on the underside of either side of the head that keeps them upright in the water. During metamorphosis the gills and fins are lost, the gill slits close, there is a modification of skin for terrestrial existence, and lungs develop.
Question: What do you notice about the development of the legs in salamander larvae. Which legs develop first? Is this different from the anuran larvae? (please answer both parts)
mussel defenses induced by the presence of
crabs?
Hypothesis: Mussels increase investment in defense in the presence of
crabs
Null hypothesis: Mussels do not increase investment in defense in
the presence of crabs
Experimental setup:
Seawater
No crab
Crab
(fed fish, not mussels)
Mussels
Mussels
Prediction: Mussels downstream of the crab tank will have thicker
shells than mussels downstream of the empty tank.
Prediction of null hypothesis: Mussels in the two tanks
will have shells of equal thickness
Results:
0.6-
0.4-
0.2
00
No crab
Crab
What conclusion can you draw from the figure above?
Without direct contact, mussels can sense the presence of crabs.
O Mussels can sense the presence of crabs only visually.
O Mussels are increasing their shell thickness in response to water current.
Shell thickness is a non-inducible defense.
O Crabs hunt for mussels by focusing on the chemicals they emit into the water.
Shell thickness lmm)
Principles behind hibernation of bears
Chapter 54 Solutions
BIOLOGY
Ch. 54.1 - Prob. 1LOCh. 54.1 - Prob. 2LOCh. 54.1 - Explain how species adapt to environmental...Ch. 54.2 - Prob. 1LOCh. 54.2 - Prob. 2LOCh. 54.3 - Prob. 1LOCh. 54.3 - Prob. 2LOCh. 54.3 - Prob. 3LOCh. 54.4 - Prob. 1LOCh. 54.4 - Prob. 2LO
Ch. 54.5 - Prob. 1LOCh. 54.5 - Discuss why populations cannot grow exponentially...Ch. 54.5 - Define carrying capacity and explain what might...Ch. 54.6 - Prob. 1LOCh. 54.6 - Prob. 2LOCh. 54.6 - Prob. 3LOCh. 54.7 - Prob. 1LOCh. 54.7 - Prob. 2LOCh. 54.7 - Prob. 3LOCh. 54 - Prob. 1DACh. 54 - Prob. 2DACh. 54 - Prob. 3DACh. 54 - Prob. 4DACh. 54 - Prob. 5DACh. 54 - Prob. 6DACh. 54 - Prob. 1IQCh. 54 - Prob. 2IQCh. 54 - Prob. 3IQCh. 54 - Prob. 4IQCh. 54 - Prob. 5IQCh. 54 - Prob. 6IQCh. 54 - Prob. 7IQCh. 54 - Prob. 8IQCh. 54 - Suppose experimenters artificially kept the hare...Ch. 54 - Prob. 10IQCh. 54 - Prob. 11IQCh. 54 - Prob. 12IQCh. 54 - Source-sink metapopulations are distinct from...Ch. 54 - The potential for social interactions among...Ch. 54 - When ecologists talk about the cost of...Ch. 54 - Prob. 4UCh. 54 - The difference between exponential and logistic...Ch. 54 - Prob. 6UCh. 54 - Which of the following is an example of a...Ch. 54 - If the size of a population is reduced due to a...Ch. 54 - In populations subjected to high levels of...Ch. 54 - In a population in which individuals are uniformly...Ch. 54 - Prob. 4ACh. 54 - Refer to figure 55.8. What are the implications...Ch. 54 - Prob. 2SCh. 54 - Refer to figure 55.14. Because the number of...Ch. 54 - Refer to figure 55.26. Would increasing the mean...
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