Soil is classified by particle size into one of three different categories: sand, silt, or clay. the diagram shows a comparison of these three particles, as well as a piece of gravel to show size differences. which best explains why all soil particles are not the same size?

The seed coat's most important function is to provide a) a nonstressful environment for the megasporangium. b) the means for dispersal. c) dormancy. d) a nutrient supply for the embryo. e) desiccation resistance.

Ascientific idea becomes valid when it is what?

Which of the following is a good definition for the word adaptation? question 1 options: a trait that an organism survive and reproduce in its environment. a change in an organism's environment. the way in which animals obtain food. a temperature change that can cause the extinction of plants and animals.