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1. How many phenotypic classes may be generated from athree-point testcross? A. (3)=27B. (2)=4C. (2)3=8D. (3)2=9E. It cannot be predicted. 2.__________ bacterial strainsrequire nutritional supplements in order to grow in a minimalmedium. A. HeterotropicB. PrototrophicC. PhototropicD. AutotrophicE. Auxotrophic 3. An arg-strain of E. coli istransformed with a plasmid carrying the […]

your hair is composedof protein known as keratins that have an alpha helix- like fibrous structure. the alpha helix-structure has approximately 3.6 amion acids per turn of of the helix and a linear dimension of 0.54nm per turn of the helix. for simplicity, let’s imagine that a strand of hair […]

Q1. What focal length must a pair of glasses have if they are to correct the vision of a person with a near point of 57.5 cm? The glasses are worn 1.8 cm from the eye. Q2. On a walk through a botanical garden, you notice a small leafy plant […]

Question: Over the long period of time that life has existed on Earth, there have been a number of important or significant innovations including (but not limited to) endosymbiosis to create mitochondria and chloroplasts; multicellularity; adaptation to land by plants and animals; development of exoskeletons in arthropods, shells in molluscs, and […]