Hummingbirds Are Sugar Junkies Source: http://bug-bird.com/hummingbirds-large-Images/ Most humans enjoy candy, cake, and ice cream. As a result of evolutionary history, we have a wide variety of tastes. This is not true of all animals. Cats do not seek sweets. Over the course of their evolutionary history, the cat family tree lost a gene to detect sweet flavors. Most birds also lack this gene, with a few exceptions. Hummingbirds are sugar junkies. Hummingbirds evolved from an insect-eating ancestor. The genes that detect the savory flavor of insects underwent changes, making hummingbirds more sensitive to sugars. These new sweet-sensing genes give hummingbirds a preference for high-calorie flower nectar. Hummingbirds actually reject certain flowers whose nectar is not sweet enough! Discuss how sweet sensitivity in hummingbirds has developed. Explain how the presence of the sweet-sensing gene increased in the hummingbird population over time,
Hummingbirds Are Sugar Junkies Source: http://bug-bird.com/hummingbirds-large-Images/ Most humans enjoy candy, cake, and ice cream. As a result of evolutionary history, we have a wide variety of tastes. This is not true of all animals. Cats do not seek sweets. Over the course of their evolutionary history, the cat family tree lost a gene to detect sweet flavors. Most birds also lack this gene, with a few exceptions. Hummingbirds are sugar junkies. Hummingbirds evolved from an insect-eating ancestor. The genes that detect the savory flavor of insects underwent changes, making hummingbirds more sensitive to sugars. These new sweet-sensing genes give hummingbirds a preference for high-calorie flower nectar. Hummingbirds actually reject certain flowers whose nectar is not sweet enough! Discuss how sweet sensitivity in hummingbirds has developed. Explain how the presence of the sweet-sensing gene increased in the hummingbird population over time,
Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN:9780134580999
Author:Elaine N. Marieb, Katja N. Hoehn
Publisher:Elaine N. Marieb, Katja N. Hoehn
Chapter1: The Human Body: An Orientation
Section: Chapter Questions
Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...
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Please answer this question and label the answer like this answer-
So i will know which one is the answer and wont be confused
Transcribed Image Text:Base your answer on the following passage and on your knowledge of biology.
Hummingbirds Are Sugar Junkies
Source: http://bug-bird.com/hummingbirds-large-images/
Most humans enjoy candy, cake, and ice cream. As a result of evolutionary
history, we have a wide variety of tastes. This is not true of all animals. Cats do not
seek sweets. Over the course of their evolutionary history, the cat family tree lost a
gene to detect sweet flavors. Most birds also lack this gene, with a few exceptions.
Hummingbirds are sugar junkies.
Hummingbirds evolved from an insect-eating ancestor. The genes that detect
the savory flavor of insects underwent changes, making hummingbirds more
sensitive to sugars. These new sweet-sensing genes give hummingbirds a preference
for high-calorie flower nectar. Hummingbirds actually reject certain flowers whose
nectar is not sweet enough!
Discuss how sweet sensitivity in hummingbirds has developed.
Explain how the presence of the sweet-sensing gene increased in the hummingbird
population over time..
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