Colistin is an antibiotic used to treat infections in the bloodstream. Some bacteria are resistant to Colistin. Explain how these bacteria have become resistant to Colistin.

What happens to the population density when the area becomes smaller?

which step in a scientific investigation would a scientist usually do before she performs an experiment?

How does a muscle spindle sense muscle stretch when the muscle is shortened?

Which blood vessel brings oxygen poor blood to the heart from the rest of the body?

What are the three components of a scientific argument?

From where dothe kenetic tiles collect energy

Landscapes will undergo the most chemical weathering if the climate is * A) cool and wet B) warm and wet C) cool and dry D) warm and dry

Why are sharks so successful at what they do?

The nucleus of an atom is comprised of

When the double stranded DNA helix is unwound, two single strands of DNA are formed. These strands have to be stabilized because their hydrophobic bases are exposed to water. The proteins that stabilize the two single strands are called