.......is secreted into the bloodstream, whereas _____ is secreted into mucus such as gastrointestinal fluid, colostrum, saliva, tears, and sweat:
a. Monomeric IgM; pentameris IgM
b. Monomeric IgA; dimeric IgA
c. Monomeric IgA; dimeric IgM
d. Dimeric IgA; monomeric IgA
Answer:
b. Monomeric IgA; dimeric IgA
Explanation:
IgA is a class of antibodies that are found mainly in body secretions. In sweat, tears, saliva, mucus, breast milk, and gastrointestinal secretions, IgA is secreted as a monomeric antibody. Smaller quantities of this class of antibodies are also present in blood and lymph. However, IgA is present in a dimeric form in the bloodstream. It makes up 10–15% of all antibodies in the blood. The main function of this class of antibodies is to give localized protection of mucous membranes against bacteria and viruses.
I believe the answer is green house effect hope this helps:)
Abiogenesis theory:
--》Aristoteles
Biogenesis theory :any process by which lifeforms produce other lifeforms.
--》Francesco Redi
--》Louis Pasteur (confirmer of Redi's theory)
Panspermia theory: Life comes from the other planets.
--》Anaksagoras (created this theory first)
--》Lord Kelvin
--》Svante Arrhenius
--》Francis Crick
Heterotroph theory :
--》Wöhler
--》Miller
--》 Fox
Evolution Theory:
--》Darwin
--》Bacon
--》Descartes
--》Leibnitz
--》Lamark
--》Georges Buffon (creator of the Evolution theory in modern science)
In addition;
Alexander Graham Cairns-Smith = Organic chemist = Origin of life
Hope it helps!
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