The Acadian flycatcher, Willow flycatcher, and Least flycatcher are morphologically very similar, but live in different habitats and do not reproduce with one another. Which species concept would be the most useful in determining if these flycatchers are different species? Explain.
What will be an ideal response?
The biological species concept provides a way of knowing when speciation has occurred without regard to anatomical differences. This flycatcher species are best defined by the biological species concept.
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The first cells evolved approximately ________ years ago
a. 2.7 billion b. 2.2 billion c. 5 billion d. 3.8 billion e. 3.2 billion
A permanent, inheritable change in the genetic information is called ________.
A. an alteration B. translation C. a mutation D. regeneration E. transcription
The compounds involved in phototropism are ____
a. phototropins b. gibberellins c. cytokinins d. phytoestrogens e. statoliths
Unusual growth of cells that do not pose a threat to
surrounding tissues are termed a. malignant. b. benign. c. metastatic. d. carcinogenic. e. repressed.