The first tetrapods (four-legged animals) were amphibians, which evolved from a specialized group of lobed-fin fish. An unusual fossilized animal (named Tiktaalik) was recently found; this animal possessed a mixture of fish and amphibian characteristics. What is the term used to describe such an intermediate organism?

The earliest life forms date back to __________ years ago.

DEFINITIONS. Define the following terms. (2 points each) Convergent evolution Homologous structures Adaptive radiation Microevolution Macroevolution Natural selection Bottleneck effect Sexual selection Sexual dimorphism Artificial selection

The origin of oxygen in the atmosphere of earth dates to __________ years ago.

You set your time machine for earth 3 billion years ago and push the start buttom. When the dust clears, you look out the window. Which of the following best describes what would be there?

Faraday’s law states that an induced emf is proportional to:

The focal length of a convex lens is 25 cm. If an object is placed at 50 cm from the lens, the distance between the object and its image in cm is

An aluminum flagpole is 23 m high. By how much does its length increase as the temperature increases by 43 C°? (The linear expansion coefficient of aluminum is 23 × 10-6 /C°.)

The voltage through a generator increases as the water flow rate through the pipe increases. It is because

Three charges are located along a horizontal straight line. The charge on the left has a force of 6.00 N on it to the left. The charge in the middle has a force on it of 4.00 N to the right. What is the force (magnitude) on the charge on the right?