involved! In a comparison between Earth's biomes, it was noted that the desert and the tundra are similar in the fact that they both A)only receive less than 60 cm of rain annually.
B)support the fewest animal and plant species per square acre.
C)have the lowest annual precipitation and the highest temperatures.
D)have a mean annual temperature that rarely exceeds 20oC.

Describe the response the kidneys have to dehydration and excessive water intake. what happens to the concentration of urine in each case ?

Agroup of students is studying convection currents. they fill two identical balloons with the same amount of helium. one balloon is placed in a freezer and the other in an area with warm air. after 10 minutes, the balloons are released from a height of 1 meter. which of the following do the students most likely observe? question 8 options: the cold balloon expands and rises. the warm balloon shrinks and sinks. the balloons rise at the same rate. both balloons are the same size. the ballons both rise. the cold ballon is larger than the warm balloon. the warm balloon expands and rises. the cold balloon shrinks and sinks.

Resperation is a way to release carbon back into the atmosphere