Why is it important for scientists to repeat an experiment several times before they are confident of their results?

Which of the following is true? A. Most of the species that have ever existed still exist today. B. About half of the species that have ever existed still exist today. C. All the species that have ever existed still exist today. D.

What animal can sleep for 3 years?

which type of macromolecule is a new drug most likely to be? A. a lipid B. a nucleic acid C. a protein D. a carbohydrate

What is happening to the population in areas like India and China

Which are characteristics of mammals? Check all that apply. A) internal fertilization B) three-chambered heart C) endothermic D) highly developed nervous system E) several nearly hollow bones F) always live on land

Valerie creates a model using three different rocks. The rocks are classified as igneous, metamorphic, and Sedimentary. Which property does Valerie use for classification purposes?

Which statement is true of all organic compounds? a. all are hydrophobic b. all contain carbon c. all are classified as carbohydrates d. all contain nitrogen?

True or False: Modifier 25 may be reported by hospital and physician (or other qualified healthcare professional) to indicate that the patient's condition required a separate E/M service on the day a procedure or other service was performed because

How do we reduce the human impact on global climate change?

What are 2 factors that have changed the relationship between people and their environment resulting in the production of pollution