Jan 13, 2018
Here’s some super low quality photos of onion root tip. Root tips are what allow a plant to grow throughout the entire lifespan, both up (branches, leaves, limbs etc.) and down (roots). The reason it is able to do so is because this portion of the plant is abundant in a group of stem cells called meristematic cells. In the above photos, you can differentiate between the cells in interphase, and the mitotic cells by looking for chromosomes. The cells in interphase look like regular cells, only enlarged, with two nuclei instead of one, and possibly even a cleavage furrow. The ‘mitotic’ cells look like they have stripes all over them, those are the enlarged chromosomes lining up at the metaphase plate preparing for division.
