Simplify the expression. - 8 + 3

5

-5

11

-11

Toxic waste can enter foods through the contamination of groundwater. True or False?

How does the sun make the water cycle possible?

In which of the following compounds is the mass ratio of chromium to oxygen closest to 1.62 to 1.00?

If a wildfire occurs in a grassland, what would be a positive effect to the ecosystem

Which of the following features are shared and best explains the close phylogenetic relationship between a starfish and a shark?

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.