Will mark write in your own ! 25 points

write a paragraph of at least three sentences about stem cells. the paragraph should include what stem cells are, the controversy around them, and your opinion about using them for research.

Aresearcher has developed two stains for use with seed plants. one stains sporophyte tissue blue; the other stains gametophyte tissue red. if the researcher exposes pollen grains to both stains, and then rinses away the excess stain, what should occur? a) the pollen grains will be pure red.b) the pollen grains will be pure blue.c) the pollen grains will have red interiors and blue exteriors.d) the pollen grains will have blue interiors and red exteriors.

Microorganisms are involved in each of the following processes excepta. smog production.b. food production.c. infection.d. o2 production.e. decomposition of organic material.

Which kind of electrical charge is found on a hydrogen atom of a polar water molecule