Something that has been tested over and over again, always with the same results, but cannot be proven, is known as what?

-Law

-Theory

-Fact

-Hypothesis

Domain is a newer portion of the classification system that includes eukarya and prokarya. what information most likely dictated that this new level be created?

The circulatory systems of land-dwelling vertebrates are composed of two pumping circuits: the systemic circulation, which is a lower-pressure circuit to the lung, and the pulmonary circulation, which is a higher-pressure circuit to the rest of the

What is one way phytoplankton contribute positively to the ecosystem? Explain one way phytoplankton can be harmful or dangerous.

Describe how a change in dna sequence could result in a changed sequence of amino acids in a protein.

View the interactive map, which illustrates tectonic plates and other features. Click the words at the top to add layers for subduction zones, volcanoes, mid-ocean ridges, and earthquakes to the map. Use this information to answer the question.

Under what conditions will the body use significant amounts of protein for energy during exercise? a. Inadequate calorie intakeb. Inadequate calorie intake and inadequate carbohydrate storesc. Inadequate carbohydrate storesd. Inadequate fluid intake

Which of the following is a true statement about hypotheses? A. It is not possible to test hypotheses through scientific investigations. B. Even if hypotheses are not supported by data, they can still be valuable. C.

A homozygous recessive female mates with a heterozygous male. What percentage of the offspring could be homozygous dominant? a. 50% c. 0% b. 100% d. 25%

Which best describes the vulva? a) It is a muscular organ where a developing offspring grows. b) It is the external part of the female genital organs. c) It is the birth canal of the female reproductive system.

The diagram shows a simple lipid. What type of lipid is shown? saturated unsaturated phospholipid triglyceride