Answer:
At least one organism benefits from commensalism.
Explanation:
The symbiotic relationship of commensalism is when one organism benefits and the other organism receives neither benefit nor harm.
So, this statement is true, because at least one organism has to benefit from the relationship, while the other will not be harmed or helped.
The things that birds have attached to their bodies called their wings, a left one and a right one, cause them to have the ability to fly.
Answer:
arthrodesis
Explanation:
Arthrodesis is also known as artificial ankylosis ans is a surgaical method to fuse the bone in a joint. This method is used when all other methods are not working and is mainly opted in case mobility of joint is affected. Arthrodesis is a painless method unlike the other joint related surgical methods. It provides a more permanent solution to joint related issues as the replacement joints implanted have the same level of motion as that of natural joints and hence it is a more viable solution as compared to other joint replacement surgeries.
b. have no nucleus in their cell