What are the advantages of having a double helix contain 2 dna strands

A natural waterway where fresh water flows from one area to another area such as the ocean is a (n)

Embryonic stem cells have show promise when used to treat certain diseases. Despite this, there are many people opposed to stem cell research based on ethical grounds

Why must dna replication happen in the nucleus of the cell

Why is it important for chromosomes (dna to be copied before cell division?

Data that is descriptive and can't be counted is called what?

The Barringer crater in Arizona contains a mineral, stishovite, only known to form under intense pressures caused by a high-speed impact. Which event most likely formed the Barringer crater?

When stress continues over long periods of time it is known as?

Which instruments do volcanologist use to predict volcanic eruptions?

How do gases enter and exit a plant?

How does the property of cohesion affect the way liquid water behaves? When water freezes, it becomes less dense. Water forms droplets whenever possible. When water vaporizes, it stores more energy than liquid water stores.