The right answer is The cells are damaged.
Take the example of skin cells.
The skin consists of two tissues:
* the outermost, the epidermis, resting on a vascularized connective tissue,
* the dermis.
In the epidermis, which includes several layers of cells, the outer layer is formed of dead cells that are desquamating and are constantly being replaced from proliferating basal cell cells. So, in normal conditions, the epidermis is in constant renewal.
On the other hand, when accidentally, the upper parts of the epidermis are damaged, for example, a slight abrasion or of a burn, the destroyed portion is regenerated (replaced) thanks to an accelerated proliferation of basal epidermal cells .
the exploitation of biological processes for industrial and other purposes, especially the genetic manipulation of microorganisms for the production of antibiotics, hormones,...
Yes, just use the camera option
Answer
Fossil records determines the length of a geological time period.
Explanation
The history of the Earth was divided by geologists using the time intervals arranged in series. These intervals differ in length because they have different events. Using the fossil remains of plants and animal species a boundary between the Permian and Triassic was identified because the fossils indicated that there was elimination of more species of plants and animals.