What is the factor that changes in a controlled experiment

This element is found in all living things. It is recycled when organisms die. It is transformed from one form to another through photosynthesis and cellular respiration. That element is

Which of the following is not a possible effect of increasing carbon dioxide levels in the atmosphere? a. increase in water contamination and floods b. ocean acidification c. cutting down forests d. reduction of cold-related deaths

A group conducted a survey of two different plots on campus. Both plots had 100 trees in them. Plot 1 had 85 maples, 5 birch, 5 oaks, and 5 pines. Plot 2 had 35 maples, 25 birch, 35 oaks, and 5 pines.

The researcher also collected height data from 200 female sheep during both years but didn't notice a significant difference in height. What could this data suggest?

A water shed is A) all the underground water in any area. B) all the area of the aquifer that provides us with water. C) the area that drains to a common waterway, such as a stream, lake, estuary, wetland, aquifer, or ocean.

What are some examples and non examples of chemical bonding?

Match the staining techniques with their purpose. A Negative stain such as India ink or Congo red. B The Gram stain C The Ziehl-Neelsen Acid-fast stain D Simple stain with a basic dye E The Schaeffer-Fulton Endospore stain Stain microbes a bright

Sandy puts a paper clip on the table and puts a magnet near the paper clip. The paper clip begins to move. What type of forces are acting on the paper clip?

Which statement is an example of absolute age? 1) Dinosaurs lived a long time ago 2) Trilobites lives before dinosaurs 3) Teachers are old 4) Dinosaurs went extinct 65.5 million years ago

Identify the structure in the cell that will produce atp from the starch building blocks