9. Which of the following describes an example of mutualism between a human and a microorganism? A. Mites feed on the skin of a human’s arm, killing cells and stealing nutrients
B. Ringworm feeds off of the skin cells of humans, causing a circle shaped rash
C. Bacteria in the small and large intestine help break down food and release nutrients D. Antibodies in the bloodstream recognize and kill a disease causing pathogen

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.

In general, characteristics that an organism survive and reproduce become more common in a population over time. what mechanism of evolution cause this change?

Energy for use in cells is stored in form of 1.chemical bond energy 2.physical energy 3.heat energy 4.mechanical energy.