Concepts of Biology
1st Edition
ISBN: 9781938168116
Author: Samantha Fowler, Rebecca Roush, James Wise
Publisher: OpenStax College
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Textbook Question
Chapter 21, Problem 2RQ
The number of currently described species on the planet is about ________.
a. 17,000
b. 150,000
c. 1.5 million
d. 10 million
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Approximately when did life first appear on land
A. 500 million years ago
B. 2 billion years ago
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The genus Homo dates back to about ____.
a. 3.9 million years ago
b. 1.8 million years ago
c. 250,000 years ago
d. 2.8 million years ago
If two mouse populations do not interbreed but are found in the same area, they may form different species due to
d. Adaptive radiation
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a. Geographic isolation
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Chapter 21 Solutions
Concepts of Biology
Ch. 21 - Figure 21.6 The Svalbard seed vault is located on...Ch. 21 - The number of currently described species on the...Ch. 21 - A secondary plant compound might be used for which...Ch. 21 - Pollination is an example of ________. a. a...Ch. 21 - Converting a prairie to a farm field is an example...Ch. 21 - Which two extinction risks may be a direct result...Ch. 21 - What kind of ecosystem are exotic species...Ch. 21 - Certain species of parrot cannot be brought to the...Ch. 21 - What is the name of the first international...Ch. 21 - Explain how biodiversity loss can impact crop...
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