A female cat in heat urinates more often and in many places. Male cats congregate near the urine deposits and fight with each other.  Which of  the  following  would  be  an  ultimate  cause  of  the  male  cats? response  to  the  female?  s urinating behaviour?

#Question id: 4601

#Unit 9. Evolution & Diversity of Life Forms

DDT was once considered a "silver bullet" that would permanently eradicate insect pests. Instead, DDT is largely useless against many insects. Which of these would have prevented this evolution of DDT resistance in insect pests?

#Question id: 4602

#Unit 9. Evolution & Diversity of Life Forms

If the bacterium Staphylococcus aureus experiences a cost for maintaining one or more antibiotic-resistance genes, what would happen in environments that lack antibiotics?

#Question id: 4603

#Unit 9. Evolution & Diversity of Life Forms

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

#Question id: 4604

#Unit 9. Evolution & Diversity of Life Forms

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 9. Evolution & Diversity of Life Forms

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 9. Evolution & Diversity of Life Forms

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