Answer:
That is false, invertebrates use gills, very few use lungs.
Answer:
b) Have a variable region that can activate complement or attach to macrophages.
Explanation:
Antibody:
Antibodies are the part of immune system that is protein in nature and produced to protect body from pathogens such as bacteria and viruses. These pathogens are recognized through the fragment antigen-binding variable region. Antibodies are also known as immunoglobulin.
Gamma globulins are the class of globulins, Antibodies are the most significant gamma globulins but it should be remember that some antibodies are not gamma globulins.
Correct Answer:
On the basis of above knowledge discussed the correct answer of this question is option b i.e Have a variable region that can activate complement or attach to macrophages.
The first one this is because the mutation on the frogs front legs could cause it to be harder to swim
Answer:
B. Improved health care, hygiene, and technology
Explanation:
I think that an improved health care system and technologies is helping to reduce the growth of various diseases, the emergence of new treatments and new drugs, which has an impact on the growth of the population.
