The centromere is a region in which a. chromatids remain attached to one another until anaphase. b. metaphase chromosomes become aligned at the metaphase plate. c. chromosomes are grouped during telophase. d. the nucleus is located prior to mitosis. e. new spindle microtubules form at either end.

Ronald wants to see if a new shower cleaner works better in removing soap than his old cleaner. he uses the new cleaner on one half of the shower tiles and his old cleaner on the other half. identify the independent and dependent variables in this experiment. enter your answer in the space provided.

The ancestors of plants that lived in water had plenty of water for the young. angiosperms are a group of land plants that evolved a reproductive trait for living on land. this trait protect young plants by allowing them to grow only when water is present and the conditions for healthy development are right. what trait most likely young angiosperms in this way?

What is the difference between a scientific hypotheses and a scientific theory?