Which of the following is characteristic of grasslands, but not savannas?
a. wide temperature range
b. droughts and fires
c. wet and dry seasons

 a. wide temperature range

In grassland there is wide temperature range as compared to savannas. The temperature in savannas usually remains warm and there are two seasons wet and dry. Grasslands have hot summer (temperature exceeds 38 degree Celsius) and cold winters ( temperature drops from negative 40 degree Celsius).

lysosome is this part of the cell is surrounded by a very thick outer membrane to protect the rest of the cell from its strong enzymes.