How many different species are there? kings and kigdoms

Which statement best describes the relationship between activation energy and rate of reaction? O Increasing the activation energy can increase the rate of a reaction. O Reducing the activation energy can increase the rate of a reaction.

The process of transforming physical energy from the environment into electrical energy in neurons is called:

What is one sign that indicates a physical change? a) matter changes, but no new substance is formed b) a substance changes color when exposed to air. c) something catches fire and turns back d) temperature drops as two liquids are mixed together

The offspring of most sexually organisms have two copies of each gene. One came from each what?

Substances with a pH of 10.0 will-- A. change red litmus paper to blue. B. change blue litmus paper to red. C. not change red or blue litmus paper. D. will not be testable using litmus paper.

C ^H! @O ^ + O @S 6 CO @ + 6 H @O DG = - 686 kcal/mol This reaction represents cellular respiration. What happens to the energy released from glucose during this reaction?

Which statement about the Internet is correct? Select the best answer from the choices provided. A.) It is completely banned by China and other repressive regimes. B.) It can bring greater political freedom to oppressive regimes. C.

Write a one - to two-paragraph summary describing cloning. (cloning of animals)

There's a good evidence that a meteor hit earth about 65 million years ago which of the following events that the scientist think were triggered by the impact could have caused the Simultaneous global extinction of multiple species including all of

What is a variable? A. A statement that explains a phenomena and can be tested. B. An educated guess used in an experiment. C. Something that must be kept constant in an experiment. D. A value or characteristic that can take different values.