Which of these is purposefully changed during a scientific investigation?

A. Test variable (independent variable)

B. Outcome variable (dependent variable)

C. Control group

D. Hypothesis

54:04 Which statement best explains why water is essential for all living things? Water makes up 65% of human beings. Water is an essential component of blood Water covers 75% of Earth's surface. Water is necessary for cellular functions

Which organism in NOT made up of 1 or more eukaryotic cells? A) Dog B) Dandelion C) Radiolarian D) Methanogen

The world's population is predicted to: A double by the year 2027 B : reach 10 billion by the year 2030 C : reach 4 billion in thirty-eight years

In the nfpa 704 labeling system, a rating of 4 in any quadrant corresponds to

A man enters the hospital complaining of chest pain. His history includes smoking, a stressful job, a diet heavy in saturated fats, lack of exercise, and high blood pressure.

Which domain does an infectious bacterium belong to? a. Archaea b. Bacteria c. Eukarya

How do oceanographers define salinity? A. Density of water B. Amount of nitrogen in water C. Temperature of water D. Amount of salt in water

An object from space burning up as it enters the atmosphere of a planet

When dna replicates the original dna is not affected and a new double-stranded dna is made from two new strands of dna. one strand of the original dna ends up in each of the new dna molecules.

Which feature separates watersheds? 1. basins 2. bays 3. ridges 4. rivers