One function of the immune system is to attack the foreign cells to protect the body. in organ transplants, the body recognizes that the new organ is made of foreign cells. what kind of medicine would you give a patient to increase the chances of transplant success?

Hummingbirds drink nectar from flowers, while robins eat plant seeds. what does this reduce?

Each pair of clay balls represents two planetesimals. if each planetesimal is composed of the same material and is separated he the same distance, which pair experiences the frayed gravitational attraction?

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.