What needs to be added to soil to create topsoil?

Explain what humidity indicates with weather

The effect that toxins have on a body depends on which of the following? Mutagens Carcinogens Teratogens All of these

Blood in the small intestine travels to the hepatic portal vein by what vessel?

Biologists and geologist how do the use the same scientific knowledge

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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.