Which of the following could be evidence that an organism's growth is influenced by the organism's genes? (hint: identical twins have identical genes. non-identical twins have about half the same genes.) a] an obese person is more likely to have friends who are obese. b] the identical twin who receives better nutrition in the womb tends to weigh more at birth. c] identical twins are more likely to be about the same height than non-identical twins. d] a dog breed can be made smaller by breeding together only the smallest dogs.

Astudent is given an assignment to demonstrate diffraction. he takes a photograph of a straw in a glass of water. the straw appears bent at the water level. which best describes this example? a) this is a good example of diffraction. b) this is an example of dispersion and not diffraction. c) this is an example of refraction and not diffraction. d) this is an example of reflection and not diffraction.

How can waves travel through ground?

Uranium has two naturally occurring isotopes. 238u has a natural abundance of 99.3% and 235u has an abundance of 0.7%. it is the rarer 235u that is needed for nuclear reactors. the isotopes are separated by forming uranium hexafluoride uf6, which is a gas, then allowing it to diffuse through a series of porous membranes. 235uf6 has a slightly larger rms speed than 238uf6 and diffuses slightly faster. many repetitions of this procedure gradually separate the two isotopes. what is the ratio of the rms speed of 235uf6 to that of 238uf6? express your answer to five significant figures.