Which level of protein structure is stabilized by ionic bonds, hydrogen bonds, van der Waals forces (all three of these are relatively weak bonds), and disulfide (covalent) bonds, which are relatively strong?

In oxidative phosphorylation, the energy released by electron transport is used to pump what ion (that later moves through the ATP synthase channel to power production of ATP) from the mitochondrial matrix to the intermembrane space?

Which of the following is an example of carrier-mediated transport across the cell membrane?

Which glucose solution would have the greatest osmotic pressure?

Which family do manatees belong to?

Why do pinnipeds require access to land or sea ice?

Which genus represents a sea-lion-like transitional whale?

What do pinnipeds in the family Odobenidae primarily feed on?

What was significant about the fossil of Maiacetus?

 (A)      (B)    There are two different pinniped families represented in the above images. Identify the family for each image as well as compare and contrast the morphological and physiological characteristics of these pinniped families. You should, at minimum, sufficiently discuss 4 morphological and 2 physiological characteristics.