Which of the following elements can be classified as a noble gas?

silver

magnesium

helium

aluminum

Organisms of the early Archean had to live: with an abundance of plant life without oxygen in the atmosphere completely on land and not in water with toxically high levels of oxygen

Select each statement that correctly summarizes and compares properties of the ocean

How can corrective lenses be used to refocus light and resolve myopia and hyperopia? - ?

Sort the chemical reactions based on whether they absorb or release energy. respiration in cellsproducing electric currentburning a candlebaking breadactivating a cold packphotosynthesis

Which of the following correctly describes the process of sexual reproduction in flowering plants? A. A sperm cell in pollen receives water and sunlight and grows into a new organism independently. B.

What is unique about dogs?

3. The best thing you can do to keep a positive relationship with your supervisor is to

What contains both communities and ecosystems?

Which of the following represents a way that animals in a zoo are influenced by their environment? a. increased natural instincts b. decreased aggression c. unnatural behavior d. increased appetite

when the process of mitosis is correctly completed, the daughter cells should contain exact copies of all of on organisms genes. which biomolecule contains all of the organisms genes