The right answer is A) Uses H2S for an energy source.
Beggiatoa is a bacterium that lives in sulphide-rich environments. They use H2S as a source of energy.
Purple sulfur bacteria, are also bacteria that depend on the presence of H2S but do not use it for the purpose of producing energy. They use it as the ultimate electron acceptor in its respiratory chain (instead of oxygen), since they are anaerobic bacteria.
D. A pond has 12 species of organisms including 300 animals and 40 plants
Ignore this I just need to answers questions to be able to ask questions
Specialized water-transporting cells serve a specific function, but are not important for survival and is denoted as option C.
<h3>What is Root?</h3>
This is referred to the part of a plant which is underground and helps to serve as anchorage for it.
It takes up nutrients and water which has to be transported to other parts of the plant but can do without them as other techniques can be used.
Read more about Root here brainly.com/question/947507
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