In a spontaneous reaction - A. the reaction happens very quickly. B. additional heat is required to make it occur. C. no additional heat is required to make it occur. D. additional heat is absorbed from the environment.

A virus measures 100 nm in length. What is its length in μm?

Why do scientists believe that the earliest life forms most likely lived in the oceans?

Electricity flows from?

a pollutant released on one continent is found concentrated in the tissues of organisms on another continent. Is this likely an air, land, or water pollutant? Explain

The diagram shows a type of extinct species, pterosaur, a bat, and a type of bird, a cormorant. All three organisms have wings that look and work alike, but were not evolved from a common ancestor.

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.

Definition: this is a haploid cell with half the reproductive information from the parent.

Does a cell use energy when molecules diffuse in or out of the cell? Why?

Below is a list of possible challenges. Check all errors that you mentioned in your answer. Traits other than beak type might affect natural selection. It could take many generations to observe adaptions to a population.

A farmer dug a well but did not find any water Which reasons most likely explain why the farmer did not find water? Check all that apply.