4. Migration of animals in the savanna is mostly a response to... A. predation

B. altitude

C. rainfall

D. temperature

This is so important ugh its 25 points

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

People with one sickle cell allele are not likely to get malaria. what is this an example of?