Which one is the correct equation for calculating density? * Density - Mass / Volume
Density - Mass / Weight
Density - Volume / Mass
Density = Volume / Weight

How many trophic levels are there in the following food chain? phytoplankton - shrimp - perch - pike - osprey

Which statement correctly identifies the scientific question and describes why the question is scientific? question 1 refers to the supernatural. question 2 reflects a moral or social value. question 3 refers to something that can be measured. question 4 reflects a question that can’t be observed.

Chloroplasts and bacteria are in size. a. similar b. at different ends of the size range c. exactly the same d. none of these