1. How did you develop from a single-celled zygote to an organism with trillions of cells? How many mitotic cell divisions would it take for zygote to grow into an organism with 100 trillion cells?

Why are plant roots and animal embryos tissues where we'd expect a lot of mitosis to occur?

3. The cells shown in the diagram are in various stages of mitosis or meiosis. All the cells come the same individual (a mammal). (a) What is the diploid number of chromosomes in this animal? (b) Give the names of each stage shown. Mannへ Wwwしw

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