Avolcanic eruption causes melting of glaciers. which of these earth systems interact during this event?
a atmosphere and biosphere
b atmosphere and hydrosphere
c geosphere and cryosphere
d geosphere and biosphere

The concept of keystone species is controversial among ecologists because most organisms are highly interdependent. if each of the trophic levels is dependant on all others how can we say one is most important

Lola needs to sign 6 invitations. using stopwatch that measures time to tenths of a second, it takes lola 5.3 seconds to sign her full name. going by the accuracy of the stopwatch, which is the most accurate determination for the number of minutes lola needs to sign all 96 invitations

Has regulatory areas for thirst, hunger, body temperature, water balance, and blood pressure