Review the terms and their definitions in the Mini Glossary. Write a sentence that explains why nuclear fusion occurs in a star.

19. a cell is viewed under a microscope and is found to have two nuclear envelopes and spindles that appear to be breaking apart. which phase of mitosis is the cell most likely in? a. metaphase b. prophase c. telophase d. anaphase

_tissues respond quickly to outside stimuli a) epithelia b)nervous c)muscular d)muscular and nervous

During photosynthesis, hydrogen ions are most directly used to in the chloroplast pictured above. a) make glucose b) make chlorophyll c) produce carbon dioxide d) drive the production of atp