BIOLOGY
12th Edition
ISBN: 9781260169614
Author: Raven
Publisher: RENT MCG
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Chapter 56, Problem 4IQ
Summary Introduction
To determine: The reason behind the less algae in streams in the presence of fishes and more algae in the case of the experiment shown in the specified figure and also determine the effect of adding snakes to the enclosure.
Introduction: The trophic cascade is a process in which the flow of energy levels getting a drop-down from the upper to the lower level. This effect is known as a top-down effect.
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This is a question NOT a writing assignment
Summarize the case of the Atlantic cod. In your response, specifically address the following points:
What method is most commonly used to extract cod?
What are the environmental consequences of this method?
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pict
Experimental Planaria #1
Cut in half into front (anterior) and rear (posterior)
Day 1
Measuring the Planaria
This operation is best performed by removing some of the water from the dish into the lid with a clean
pipette and waiting for the worm to stretch out. Measure the length of the worm in millimeters. (Always
replace the water right away, you can use the dish lid to transfer water to and from the planarian
environment.)
A. Record the length of the front (anterior) section just AFTER you cut. This is your
INITIAL front length: 5 m m
B. Record the length of the rear (posterior) section just AFTER you cut. This is your
INITIAL rear length: 3mm
C. Observe and record any behavioral responses just after your cut
Day 2
Spend time under the microscope observing the cut Planaria. Answer the following
questions based on your observations. NO measurements will be taken on this day.
a) Are the cut fragments showing signs of regeneration?
b) How did you identify the regenerating portion?…
Chapter 56 Solutions
BIOLOGY
Ch. 56.1 - Prob. 1LOCh. 56.1 - Prob. 2LOCh. 56.1 - Prob. 3LOCh. 56.2 - Describe the different trophic levels.Ch. 56.2 - Distinguish between energy and heat.Ch. 56.2 - Explain how energy moves through trophic levels.Ch. 56.3 - Explain the meaning of trophic cascade.Ch. 56.3 - Prob. 2LOCh. 56.4 - Define ecosystem stability.Ch. 56.4 - Prob. 2LO
Ch. 56.4 - Prob. 3LOCh. 56.5 - Prob. 1LOCh. 56.5 - Prob. 2LOCh. 56 - Prob. 1DACh. 56 - Prob. 2DACh. 56 - Prob. 3DACh. 56 - Prob. 4DACh. 56 - Prob. 1IQCh. 56 - Prob. 2IQCh. 56 - Prob. 3IQCh. 56 - Prob. 4IQCh. 56 - Prob. 5IQCh. 56 - Prob. 6IQCh. 56 - Prob. 7IQCh. 56 - Which of the statements about groundwater is NOT...Ch. 56 - Photosynthetic organisms a. fix carbon dioxide. b....Ch. 56 - Prob. 3UCh. 56 - Nitrogen is often a limiting nutrient in many...Ch. 56 - Prob. 5UCh. 56 - Prob. 6UCh. 56 - Inverted ecological pyramids of real systems...Ch. 56 - Prob. 8UCh. 56 - Prob. 9UCh. 56 - The equilibrium model of island biogeography...Ch. 56 - Based on results from studies at Hubbard Brook...Ch. 56 - According to the trophic cascade hypothesis, the...Ch. 56 - At Cedar Creek Natural History Area, experimental...Ch. 56 - Given that ectotherms do not utilize a large...Ch. 56 - Given that, in general, energy input is greatest...Ch. 56 - Prob. 3SCh. 56 - Explain several detailed ways in which increasing...
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