Number 1:4
number 2: 3
number 3: 1
Answer: Option A) secreting antibodies from eccrine glands
Explanation:
The eccrine glands, a type of sweat gland found in the deep layer of the skin provides protection from infection by producing sweat that is majorly composed of water, but also immunoglobins.
These immunoglobins are designed to respond to foreign and potentially harmful pathogens, removing them and protecting the body.
Thus, the answer is secreting antibodies from eccrine glands
Answer :Erwin Chargaff a Biochemist
Explanation:
He formulated the base paring of double helix of DNA. He reasoned that since the percentage of four DNA bases are of this proportions in human;
Adenine=30.9% and Thymine =29.4%;
Guanine=19.9% and Cytosine =19.8%
Then, the amount of adenine will always be equal to thymine,
And the amount of Guanine equals to cytosine based on this percentages of distribution.
(Adenine and Guanine are large, molecule of Purines, while thymine and Cytosine are Pyrimidine)
He concluded (although scientist believed, he did not explicitly stated this) that this should be the base paring patterns in DNA molecule. This is the first Chargaff Rule.
His second rule is that the DNA composition, in the relative amount of the four bases Adenine, Thymine, Cytosine and Guanine varies in proportion from one organisms to another. And this is the basis of molecular diversity.
The respiratory system works directly with the circulatory system to provide oxygen to the body. Oxygen taken in from the respiratory system moves into blood vessels that then circulate oxygen-rich blood to tissues and cells.
Fossil evidence, and biographical evidence.
