Answer: Geologic time is divided into units. Major changes in the earth's surface or climate and the extinction of species help to divide the time scale into smaller units.
Explanation: Rocks grouped within each unit contain a similar fossil record.
Answer:
Keratinocytes are located in the stratum basale in the epidermis and the hair follicle of the dermis. This statement is correct.
Explanation:
Keratinocytes are in the stratum basale of the epidermis, which is the deepest layer of the epidermis; from this layer, they ascend to the stratum spinosum, then to the stratum granulosum, then to the stratum lucidum if the skin is thick like the one that is in our hands or soles, and lastly they end in the stratum corneum. While the keratinocytes move from one layer to the next one, they change their characteristics.
Keratinocytes are also in hair follicles, they are similar to the keratinocytes from the dermis, but have some differences, such as their reproduction capacity.
Multicelluar is the answer to your question
The correct answer is option D- surgery to remove the obstruction
Vasectomy is a surgery which is used to permanently sterile a male but in this case vasectomy will be done to remove the scar tissues from the vas deferens and then joined back.
A surgeon will make a small incision on the scrotum and then remove the scar tissues. Once the tissues are removed, the both ends of the tube will be aligned back and sewn together under a microscope.