A biologist passes blood isolated from a mouse through an affinity column containing beads. The beads have been modified to display both the antigen alone and the antigen attached to a class II MHC molecule. Some cells stick to the column while the rest wash through with a buffer wash. Which class(es) of cells would be represented by the cells that stick to the column

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.

Which of the following is an eon in the time scale? phanerozoic proterozoic archean all of the above

Which is a kingdom? protistachordataprokarya mammalia