Microtia is a congenital condition in which a child is born with an underdeveloped outer ear on one or both ears. Ears are formed on a fetus during the first trimester of pregnancy. Children born with microtia generally have a fully functioning inner ear but tend to suffer from hearing loss due to the closure of an external ear canal. Many children with microtia can now be grown new ears in laboratories by using the child’s own stem cells. The new ear(s) can then be used to surgically repair the condition.
Which of the following processes allows scientists to grow new ears for children with microtia?
Responses
A MeiosisMeiosis
B Radiation therapyRadiation therapy
C ConjugationConjugation
D Mitosis
D Mitosis
The diagrams show different stages of cell division in the somatic cells of a plant. The stages are not shown in order.
Which statement correctly lists the order of the stages?
Responses
A P, R, QP, R, Q
B Q, R, PQ, R, P
C R, P, QR, P, Q
D P, Q, R
C R, P, Q
The process that allows scientists to grow new ears for children with microtia is mitosis. Mitosis is a type of cell division that occurs in somatic (non-reproductive) cells, where one cell divides into two identical daughter cells. In this case, scientists can take stem cells, which have the ability to differentiate into different types of cells, including ear cartilage cells, and generate new tissue through the process of mitosis. These new ear cells can then be used to create a new ear for the child with microtia through surgical repair.
So, the correct answer is D) Mitosis.