Exam 6: Water Relations

Sharks,rays,and skates retain urea and trimethylamine oxide (TMAO)within their blood allowing them to become only slightly hyperosmotic thereby reducing the cost of osmoregulation.

Water conservation mechanisms used by plants adapted to dry conditions include

A high water vapor pressure deficit indicates that the water vapor content of the air is near saturation.

The diffusion of water across a differentially permeable membrane is called _______.

The water availability for organisms is determined by

The camel and saguaro cactus both

Water flows from the soil into the plant roots because the water potential of the soil is higher than the water potential of the roots.

The potential for evaporative water loss by terrestrial organisms

A desert scorpion will use all of the following mechanisms in order to survive in the desert except:

If a person were to place a marine fish into a fresh water lake,water would diffuse

Saturation water vapor pressure

Bony marine fish

The Namib Desert beetle,Onymacris unguicularis,obtains its water through positional maneuvers during foggy weather conditions.

Metabolic water is the water that is released by the process of ___________________.

Relative humidity = [ ___________________ / saturation water vapor density] x 100