they combine the DNA of two different organims.
Explanation:
they join together genetic material especially the DNA from different biological species
Answer:
Keratin serves important structural and protective functions, particularly in the epithelium. Some keratins have also been found to regulate key cellular activities, such as cell growth and protein synthesis
Antihistamine
This is a medication that can be bough without prescription. These is primariy used in allergies such as runny nse, watery eyes and itching. This can also give side effects such as drowsiness, dizziness and confusion. This can also affect on how the body process chemicals making them especially risky in combination with other drugs. This can have interactions with other drug that even a non lethal dose can cause life threatening condition.
It is d I’m sure though it is b pretty sure explanation