Which of the following is not true of deciduous forests? a. characterized by four seasons b. trees lose their leaves in the fall c. precipitation is concentrated in one season d. averages 30-60 inches of precipitation annually

What type of organism is a one-celled organism that functions as a single unit? a. bi-celled b. single-celled c. pre-celled d. multi-celled

The current thought on the structure of the cell membrane is: a. a static phosphate sandwich of lipids b. a fluid-mosaic of phospholipids and proteins c. a bilayer of proteins with static lipid molecules d. an impermeable bilayer of protein molecules e. a static and permeable phospholipid single layer

Wich is not standing in the way of astronomers getting a good view of different star