The unicellular spores of the fern ceretopteris richardii are about 100 um in diameter. calculate the surface-area-to-volume ratio of a cube whose sides are 100 um in lenth to approximate the surface-area-to-volume ratio of the fern spore cell

Aristotle classified animals according to their a. habitat and mating behavior c. mating behavior and relatedness b. habitat and physical differences d. physical differences and mating behavior

Amino acids contain the elements carbon, hydrogen, oxygen, nitrogen, and sometimes sulfur. of the 20 amino acids found in humans, 11 are called "nonessential" because they can be manufactured by the body when needed. which elements in these 11 amino acids are commonly obtained from the metabolism of sugar molecules?

Which of the following is a responsibility of a scientist