The time gap between the two instants , one before and one after 12 : 00 noon , when the angle between the hour hand and the minute hand 66° , is

#Question id: 4603

#Unit 11. Evolution and Behavior

Of the following anatomical structures, which is homologous to the bones in the wing of a bird?

#Question id: 4604

#Unit 11. Evolution and Behavior

Structures as different as human arms, bat wings, and dolphin flippers contain many of the same bones, which develop from similar embryonic tissues. These structural similarities are an example of ________.

#Question id: 4605

#Unit 11. Evolution and Behavior

Over long periods of time, many cave-dwelling organisms have lost their eyes. Tapeworms have lost their digestive systems. Whales have lost their hind limbs. How can natural selection account for these losses?

#Question id: 4606

#Unit 11. Evolution and Behavior

Which of the following evidence most strongly supports the common origin of all life on Earth? All organisms ________.

#Question id: 4607

#Unit 11. Evolution and Behavior

Members of two different species possess a similar-looking structure that they use in a similar way to perform about the same function. Which of the following would suggest that the relationship more likely represents homology instead of convergent evolution?

#Question id: 4608

#Unit 11. Evolution and Behavior

What must be true of any organ described as vestigial?