A wild-type culture of yeast is exposed to the mutagen ethyl methanesulfonate (EMS). Yeast cells are plated on a complete medium, and 6 colonies are transferred to a new complete medium plate for further study. Seven replica plates are made from the complete medium plate to plates containing minimal medium or minimal medium plus one or two amino acid with the following results. Determine which colonies are prototrophic (wild-type), auxotrophic for one amino acid, or auxotrophic for more than one amino acid.

Gene expression is the activation of a gent that results in a question 1 options: protein dna mitochondria

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 describes the difference in stimuli required to detect a difference between the stimuli? a. just noticeableb. signal detectionc. subliminald. top down