Paramecium is a single-cell eukaryotic organism that can reproduce by mitotic cell division. Prior to the M phase of the cell cycle, which of the following must oCcur? A. The cell must replicate its chromosomes. B. The nucleus must divide. C. The cell must first be fertilized. D. Sister chromatids must be separated. A. The cell must replicate its chromosomes.

In mitosis, chromosomes separate by which specific mechanism?   A. chromosomes sprout flagella and begin to swim towards the ends of the cell B. molecular motors in the kinetochore move the chromosome toward the centrioles C. centrioles attract the chromosomes by electromagnetic attraction D. centrioles begin to shorten microtubules by degrading them

You are studying reproduction in starfish (also known as sea stars).  You are able to successfully extract sperm and eggs from individuals in the lab and artificially fertilize the eggs.  What is the second thing you expect to see (from this list) in the zygote/embryo after successful fertilization? Group of answer choices A. development of a barrier against sperm entry B. rapid cell division without growth C. rapid growth and cell division D. development of organs

A researcher, who is examining a sample of cells of the same types at different stages of cell division, isolates a group of cells in the sample that have 1.5 times the amount of DNA as cells at the G1 phase. Which of the following best describes this group of isolated cells? A B с D They are in the M phase of the cell cycle. They are between the G1 and the S phases in the cell cycle. They are in the S phase of the cell cycle. They are in the G2 phase of the cell cycle.