If the half-life of a radioactive isotope is 5,000 years, how many grams of the radioactive isotope in a specimen will be left after 10,000 years if you start off with 100 grams of the radioactive isotope?

Which statement accurately describes the relationship between the brain and addiction A. the brain reacts to excessive dopamine levels by increasing the number of dopamine receptors. B. all drugs act on dopamine synapses in the same way C.

Groups of ecosystems that have the same climate and dominant species are known as * 1 pa Populations Habitats Ecosystems Biomes

If God created the Universe, then who created God?

Which one of the following is an example of osmosis? A. Water enters a plant by passing through the root cell membranes. B. Potassium ions enter a red blood cell through the action of a specific ion transport protein. C.

During which phase of the cell cycle does DNA replicate?

Why is it critical to divide the chromosome number in half?

The amino acid proline is one of the three amino acids that watson describes as having "special properties". what is special about proline?

Which nursing action is accurate when administering an im injection using the z track method?

Which of the following is not a symptom of influenza? a. headache b. muscular aches c. dry cough d. diarrhea

Which term describes this example? A child with no freckles has a mother who has freckles and is heterozygous and a father who has no freckles and is homozygous recessive. a. female b. heterozygous c. homozygous recessive d. homozygous dominant e.