The answer is number 4 hope this helps
The answer is D) <span>Electrons are transferred to ferredoxin.
Photosystem I is the part of </span><span>photosynthetic light reactions. It is membrane protein complex which uses light energy to transfer electron from plastocyanin to ferredoxin.</span>
Alkanes are linear, or branching, compounds that are made of varying numbers of carbon atoms that are all saturated with hydrogen atoms. The formula for an alkane is CnH(2n+2). This means that the number of hydrogen atoms equals twice the number of carbon atoms, plus two. Methane is the simplest hydrocarbon possible.
The body was preserved because the body was frozen in the cold temperature of the Alps shortly after he died and remained frozen until it was found.
<h3>How is a body preserved?</h3>
It is common to observe that bodies are often preserved at a very low temperature hence the body was preserved because the body was frozen in the cold temperature of the Alps shortly after he died and remained frozen until it was found.
The reason why the AIDs virus which contains RNA, to insert into the DNA of a host of T-cells after the AIDs virus enters the cell is because of receptor proteins located on the surface of the virus.
The organism that lacks the ability to maintain their own metabolic pathways and can only reproduce inside of a host cell are the viruses.
The chemicals released by one type of immune cell to directly activate another type of immune cell are the cytokines.
Learn more about cytokines:brainly.com/question/12199920
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I think its b i hope am right
