Which of the following is an example of how a scientist might use a model? question 1 options: a stopwatch is used to time the rate of a chemical reaction. a microscope is used to magnify a group of cells on a slide. a wrench is used to tighten a nut onto a piece of wood. the end of a slinky is moved vertically up and down to simulate a wave.

Sydney drew a flow chart to illustrate the nitrogen cycle.which labels best complete the flow chart? x: producers undergo photosynthesis.y: nitrogen compounds are released into the air.x: nitrogen compounds are released into the air.y: producers undergo photosynthesis.x: free nitrogen is in the atmosphere.y: producers absorb nitrogen compounds through their roots.x: producers absorb nitrogen compounds through their roots.y: free nitrogen is in the atmosphere.

What is the difference between a scientific hypotheses and a scientific theory?

Which process is represented a.) deletion b.) nondisjunction c.) translocation d.) insertion