Which of the following is an example of mutualism?
a) a rabbit population is the main source of food for a certain fox population
b) ticks can attach and live on the blood of bison
c) in their attempt to obtain nectar from blooms, bees pollinate a population of flowers
d) birds feed off the flies that swarm around buffalo

What element is able to combine with itself and hydrogen to form large molecules ?

This is a typical grassland food web. it is also a small picture of an important cycle on earth: the carbon cycle. describe how the carbon gets into this food web. a) bacteria and fungi, the decomposers, recycle carbon from dead organisms. b) carbon is found in the grass and is passed from one level to the next in this food web. eliminate c) all living things give off carbon dioxide as a by-product of respiration and it is released into the atmosphere. d) plants use carbon dioxide as a reactant in photosynthesis, to make usable chemical energy in the form of a sugar.

Match each medication with its description.