The most distinctive xylem cells are the long tracheary elements that transport water<span>. </span>Tracheids and vessel elements are distinguished by their shape<span>; </span>vessel elements are shorter, and are connected together into long tubes that are called vessels<span>. </span>Xylem<span> also contains two other </span>cell<span> types: parenchyma and fibers.</span>
Answer:
B. Cells in Alex’s body underwent mitosis to create new tissue
Explanation:
Mitosis is the cell division that forms two genetically identical daughter cells from one parent cell. It occurs in somatic cells and is responsible for the growth and development of individuals.
Alex gained the height as the cells in tissues of his body underwent the mitosis and produced new daughter cells. Repeated cycles of mitosis added a large number of new cells to his body to form new tissues in his body parts and caused an increase in his height.
Answer:
Pros of HeLa cells:
- HeLa cells are immortal ,easy to maintain and can be kept alive.
- HeLa cells easily contaminate cell lines and thus can be incorporated easily into target tissues.
Cons of HeLa cell:
- The HeLa cells can easily contaminate cell lines and a lack of regular monitoring leads to unwanted contamination of cell lines resulting in wastage.
Explanation:
HeLa cells are immortal cells that are used in scientific and medical research. These were obtained from Henrietta Lacks , a cervical cancer patient. These cells are well known for their immortality, rapid growth and high contamination rate. These were unique cancerous cells that kept on dividing and remained alive easily.
Answer:
The atomic number of phosphorus is 15. It has zero charge because it has 15 electrons.
Explanation:
Excretion - Getting rid of
waste
Reproduction- The ability to
produce
offspring to
keep the
species in
existence.
Growth- The process
increasing
hysical
