What are the 3 primary elements that cycle between the mitochondria and chloroplasts

Suppose you are estimating the size of a blue crab population. what is the population size if the number marked in the first catch is 40, the total number in the second catch is 200, and the number marked in the second catch is 50?

Did the vinegar diffuse all the way to the center of any of the cubes? if so, which ones? what does this tell you about surface area-to-volume ratio and the diffusion rate?

This is collection of data made by comparing objects in standard units. in science, the units are metric.