C. because stimuli is how your body responds to something, and in this case, someone's heart rate increases WHEN their blood oxygen drop. Do you see how it responds? ;-)
Answer:
A hill is a part of land that rises higher then everything surrounding it its like a little bump in the earth. Mountains have less steep and not as high but a hill will usually have and obvious summit which is its highest point
Only the energy used for growth (33 J) is available to the next trophic level, because it is used to produce more biomass which can be consumed by the next trophic level.
There are several reasons that contribute to the high level of biodiversity found in the wetlands. Firstly it provides numerous animals and insects to find their food and breed easily. Also this wetland helps the animals to camouflage against their enemies. The wetlands provide home for abundance of marine animals. It is actually a place that maintains a natural balance.<span />
