Which of the following best describes the dependent variable?

The variable that responds to change.

The variable that is deliberately changed.

The variable kept constant.

The treatment in an investigation

To what class f compounds does ammonia belong to

What is the major missing factor in primary succession that is present in secondary succession?

What characteristic is common to both nodosaurids and ankylosaurids?

Plant species A cannot fight most fungal infections, while plant species B makes a protein that kills many fungi. What is one possible way for humans to engineer species A plants that can produce the fungus-killing protein?

All plant cells are placed into the Eukaryotic domain. True False

If you are viewing bacteria with the microscope and use the 40x objective, what is the actual magnification you are viewing the specimen at?

Which human activity has had the greatest impact on climate change? A. deforestation B. burning fossil fuels C. production of nuclear waste D. building skyscrapers

How long can food that requires time-temperature control be left in the danger zone? A. A maximum of 3 hours B. A maximum of 4 hours C. A maximum of 1 hour D. A maximum of 2 hours

Explain the characteristics of this soil sample that likely allowed Judy to make this identification. Include particle size and texture in your response.

Rick uses an electronic air sampler to determine the amount of dangerous chemicals in the air. Which functions of the air sampler confirm that it is an electronic tool? Check all that apply. It collects chemical data.