A contractile vacuole is a structure that collects extra water and expels it from a protist.

True or False

Which of the following is not a fat-soluble vitamin? a. vitamin A b. vitamin C c. vitamin D d. vitamin E

Why is sperm different?

Which of the following is/are author/s of American literary realist fiction? A. Mark Twain B. William Bradford C. Sarah Orne Jewett D. Charles Waddell Chesnutt

Describe 3 ways a mutation can occur?

The part of the enzyme where the substrate fits is known as the ___. active site isomer position activation site none of these

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.