What type of rocks form due to high pressure

What is thought to have caused the mass extinction at the end of the cretaceous period?

Which of these best describes what occurs during cytokinesis? a) the chromosomes are separated b) the cell begins to divide by replicating the chromosomes c) the cytoplasm is divided between the two new daughter cells d) the nucleus opens to allow the chromosomes to enter the cytoplasm

Read each description below and determine to which stage of sleep each pertains. then click and drag each box into the appropriate category below.