Annelids have closed circulatory system
Guanine-cytosine is one of the nucleotide pairs that would be found in a DNA molecule. The other is Adenine- Thiamine.
Explanation:
Pyrine bases – Adenine & Guanine- pair with pyrimidines bases – Cytosine and Thiamine. Adenine pairs with Thiamine while Cytosine pairs with Guanine.
In RNA, however, while this same principle of base pairing is observed, rather than Thinmaine, RNA has Uracil in its place. Therefore, in RNA, Adenine pairs with Uracil. There is no Thiamine in RNA.
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The difference between active and passive immunity is that your body produces antibodies in active immunity and in passive immunity, the antibodies are made outside the body. (D)
What is active and passive immunity?
Active immunity is a type of immunity that occurs when the immune system of a person is responsible for protecting them from a pathogen or from an infection.
Passive immunity is a type of immunity that involves the introduction of antibodies from another person or from outside the body of a person.
Antibodies are produced by an individual in active immunity but in passive immunity, antibodies are being transferred to an individual to help boost their immune system in fighting diseases.
Thus, the difference between active and passive immunity is that your body produces antibodies in active immunity and in passive immunity, the antibodies are made outside the body. (D)
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A heterogeneous mixture composes of non- uniform components, so the concrete would be the answer, because you can tell the components from one another.