A researcher wanted to know if introduced predators (lake trout, a fish) caused a decrease in the abundance of yellow-legged frogs. The ecologist measured the density of frogs (number frogs per meter of shoreline of a lake) in lakes that did not have any introduced predators (fish absent), lakes that had previously introduced predators (fish present), and lakes from which he removed the predators (fish removed), and then recorded if frog density increased, decreased, or stayed the same over one year. part a: What was the role in the experiment of the “fish present” lakes? Group of answer choices A. subjects B. experimental group C. positive control group D. negative control group E. standardized condition part b: This study focused primarily on ______________ ecology. Group of answer choices A. organismal B. population C. community D. physiological E. biosphere
A researcher wanted to know if introduced predators (lake trout, a fish) caused a decrease in the abundance of yellow-legged frogs. The ecologist measured the density of frogs (number frogs per meter of shoreline of a lake) in lakes that did not have any introduced predators (fish absent), lakes that had previously introduced predators (fish present), and lakes from which he removed the predators (fish removed), and then recorded if frog density increased, decreased, or stayed the same over one year. part a: What was the role in the experiment of the “fish present” lakes? Group of answer choices A. subjects B. experimental group C. positive control group D. negative control group E. standardized condition part b: This study focused primarily on ______________ ecology. Group of answer choices A. organismal B. population C. community D. physiological E. biosphere
Concepts of Biology
1st Edition
ISBN:9781938168116
Author:Samantha Fowler, Rebecca Roush, James Wise
Publisher:Samantha Fowler, Rebecca Roush, James Wise
Chapter19: Population And Community Ecology
Section: Chapter Questions
Problem 2ACQ: Figure 19.6 If the major food source of seals declines due to pollution or overfishing, which of the...
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A researcher wanted to know if introduced predators (lake trout, a fish) caused a decrease in the abundance of yellow-legged frogs. The ecologist measured the density of frogs (number frogs per meter of shoreline of a lake) in lakes that did not have any introduced predators (fish absent), lakes that had previously introduced predators (fish present), and lakes from which he removed the predators (fish removed), and then recorded if frog density increased, decreased, or stayed the same over one year.
part a:
What was the role in the experiment of the “fish present” lakes?
Group of answer choices
A. subjects
B. experimental group
C. positive control group
D. negative control group
E. standardized condition
part b:
This study focused primarily on ______________ ecology.
Group of answer choices
A. organismal
B. population
C. community
D. physiological
E. biosphere
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