Answer:
B. it expands and shrinks in the soil
The answer to this would be D: physical components of the environment, such as rocks and sand. The word "biotic" mean all the living organisms within an ecosystem such as plants and animals.
Yes they are the best way to combine traits
Answer:
Explanation:
Density, the weight of an object divided by its volume, is a property of all matter, including solids, liquids and gases. The value of an object's density depends on what it's made of as well as its temperature; for example, lead weights are denser than feathers, and cold air is denser than hot air.
Answer:
The independent variable is "controlled" or held constant in the control group.
Explanation: