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 is a proximate cause of this behaviour of increased urination?

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#Question id: 8917

#Section 2: Evolution

The Hox genes came to regulate each of the following in what sequence, from earliest to most recent?

1. identity and position of paired appendages in protostome embryos

2. formation of water channels in sponges

3. anterior-posterior orientation of segments in protostome embryos

4. positioning of tentacles in cnidarians

5. anterior-posterior orientation in vertebrate embryos

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#Question id: 16838

#General Aptitude

To which object does the given top view correspond?

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#Question id: 12581

#Section 5: Applied Ecology & Evolution

Which of the following causes an increase in the intensity of UV radiation reaching the Earth? 

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#Question id: 4593

#Section 2: Evolution

Which of Darwin's ideas had the strongest connection to his reading of Malthus's essay on human population growth?

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#Question id: 11352

#Section 1: Ecology

Experimental removal of predatory typhlodromus mites from strawberry fields illustrated which of the following?