Use complete sentences with correct grammar, spelling and punctuation to answer the question below.   Name and describe two types of defenses animals have evolved in response to predation.  Give an example from the textbook of each.  

If the niches of two species are very similar, which one of the following is true?  

What is the chart below called? Scientists construct these charts based on what three things? Of all the phyla listed in the boxes on the right, which one is the most primitive?

Examine the chordate phylogenetic tree below.   State which groups belong to the amniotes: State the group who were the first tetrapods: State the group where a vertebral column first appeared;  

What does it mean to consider “attention” a collective resource/public good? What words best describe American with respect to their attentiveness to political news and their levels of civil and political knowledge. Draw on the findings reported in lecture that you consider the most important/concerning/surprising regarding how people allocate their attention.

A hanging mass of 1.53-kg hangs on a rope wrapped around a pulley of mass 7.07 kg and radius 66 cm. This pulley is frictionless in its axle and has the shape of a solid uniform disk. After the mass has been released, what is the acceleration of the falling mass? Two significant digits only.

A rotator is rotating with a constant angular speed of 500.0 rpm. How many revolutions will it make in 20.5 s? Three significant digits.

A solid disk has a 1.5 m diameter and a mass of 250 kg. A motor spins up the disk with a constant torque of 50 .  How long in seconds does it take the disk to reach top angular speed of 1200 rpm?

You need to determine the density of an object. If you suspend it from a spring scale, the scale reads 28.4 N. If you then lower the object into a tub of water so that it is completely submerged, the scale reads 17.0 N. What is the density of the object? Two significant digits. (Hint: Recall tension in a string and the volume of displaced fluid for an object completely submerged) in our examples. Use: Density of water as 1000 kg/m3.

A 530-kg elevator is pulled upward with a constant force of 5800 N for a distance of 39.0 m. Calculate the magnitude of the work done by the net force.