What are some primary contributors to background radiation?

cars, jets, and trains

televisions and computers

fossil fuels and oxygen

plants, animals, and cosmic rays

Silent mutations are changes that

Water molecules from Earth's Surface, Water bodies, and Plants enter the U atmosphere to form Clouds Composed Of tiny Water droplets. This Water eventually returns to Earth's Surface through Which Of these Processes

Which theory about the universe's size best matches the experimental evidence found by astronomers and physicists? A. The universe is expanding at a rate faster than in the past. B. The universe is contracting at a rate faster than in the past. C.

In metaphase the chromosomes are all aligned in the center of the cell? True or false

Which of the following isn't an organism? a. human b. mold c. bacteria d. lung

What is the purpose of implantation pregnany?

Ivy starts to get into the hot tub, but the water feels extremely hot. She stands in the water for a few moments, then slowly eases the rest of her body down into the water.

The differences between hashimotos' thyroiditis and grave's disease include b. only hashimoto's is a type ii hypersensitivity a. only grave's disease is an autoimmune disease c.

How could natural selection lead to evolution?

What algae is golden brown and one of the most common of all the unicellular organism in the ocean?