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 […]

1. Which of the following were important firstclues for Darwin’s formulation of his Theory of Natural Selection?Choose all that apply. a. Offspring look like their parents andseem to inherit their traits.b. Blue-footed boobies do a strangecourtship ritual prior to mating.c. Different eating habits of fincheson the separate islands and on […]