I am mostly sure the answer is B. Good luck, and sorry if it's wrong! :(
Answer:
B..........................
Salt concentration is the factor among the following factors given in the question that does not vary between a fast flowing river and a pond that receives no water input. The correct option among all the options that are given in the question is the second option. I hope the answer comes to your help.
Answer:
By the same token, any random change in a gene's DNA is likely to result in a protein that does not function normally or may not function at all. Such mutations are likely to be harmful. Harmful mutations may cause genetic disorders or cancer. A genetic disorder is a disease caused by a mutation in one or a few genes
Answer:D Is the correct answer.
Explanation: All of the options could be the parents of the child with type O blood, because every type of blood has an O type in it.