Xylem vessels are made up of hollow cells designed to carry water and minerals from the roots of a plant to the trunk, with altered cell walls to allow for the passage of one vessel to another. They also provide structural support to vascular plants.Know More
Xylem vessels are made up of cells known either as tracheids or vessel members. All vascular plants have tracheids, which are less specialized but have a special cell wall known as a pit membrane. This structure prevents the passage of damaging air bubbles from one xylem vessel to another. These are typically the only cells found in the xylem of gymnosperms, such as pine trees, and seedless vascular plants, such as ferns. Vessel members are more specialized cells with areas that lack any cell wall or membrane, known as perforations. These allow for easy passage of water between vessels, but also allow easier passage of air bubbles that can cause fractures and disruptions to the xylem. Vessel members are the principal components of xylem in flowering plants.
Xylem cells grow within the lengthening tips of roots and shoots. In woody plants, they are the bulk of the plant tissue and grow in rings as the plant expands. The inner rings die as the plant grows, remaining in place to provide structural support.Learn more about Cells
Root cells do not contain chloroplasts because in most plants the roots are underground and not exposed to light. Chloroplasts are needed for photosynthesis, which needs light to occur.Full Answer >
A tomato cell is any cell from a tomato plant, though generally cells from the fruit rather than the roots or leaves are meant. Tomato cells are frequently used in lab classes to introduce biology students to the principles of microscopy and to familiarize them with plant cell anatomy.Full Answer >
Onion roots are ideal for studying mitosis because onions have larger chromosomes than most plants, making the observation of cells easier. The roots of plants also continue to grow as they continue to search for water and nutrients. This also makes it easy to find cells in the roots of onion plants at different stages of mitosis.Full Answer >
Cells have different shapes to allow them to interact with their environments and other cells. Some cells have shapes that favor fast movement. Others are shaped in a way that allows collections to grow effectively.Full Answer >