Questions 15 to 17 pertain to the situation described below:   Imagine a particle moving at constant speed in the counterclockwise sense along the circle in the plane of the paper, where point A is the point farthest to the left on the circle and point B is the point farthest to the bottom as shown.  

A vector of magnitude 20 directed in the negative y-direction has a y-component of 

Questions 5 and 6 pertain to the two vectors shown below:

During the 10-sec time period, the direction of the car’s average acceleration must be

Which of the following choices represents the vector

The direction of the particle’s acceleration at point A is

The prokaryotic domains include

Which statement regarding normal microbiota is TRUE?

The cytoplasmic membrane of both prokaryotic and eukaryotic cells functions to

Which macromolecule is found in the cell walls of all bacteria?