What is the main purpose of controlled variables in an experiment?

Low tide is the best feeding time for land predators such as seagulls a. true b. false

You maintain internal body temperature through negative feedback mechanism. Which of the following is a response to decrease body temperature when you are in warm/hot environment? A) Our muscles contract to cause shivering.

Involuntary muscle contractions which move a bolus through the gastrointestinal tract are called

What are the three types of Spatial Distribution?

All eukaryote cells belong in which group? a. domain Eukarya. b. domain archaea. c. domain bacteria. d. king protista. e. kingdom animalia.

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.