A bacterium is found that can photosynthesize in the presence of light but uses hydrogen sulfide and releases elemental sulfur as a by-product. This organism can best be classified as a
photoheterotroph.
pathogen.
chemolithoautotroph.
photoautotroph.
chemoheterotroph.

Chemolithoautotroph

Explanation:

A chemolithoautotroph is an autotrophic microorganism that obtains energy by oxidizing inorganic compounds. Most chemolithotrophs are autotrophs. Examples of relevant inorganic electron donors include hydrogen, hydrogen sulfide, ferrous iron, and ammonia. Winogradsky described the concept of chemolithoautotrophy for the first time while studying the ammonia-oxidizing bacteria. Chemolithoautotrophic organisms have electron transport complexes, similar to those of chemoorganotrophs, which are used to generate a protein motive force. The proton motive force drives the synthesis of ATP. In this case, the reduction of CO2requires the use of ATP and reducing power, which is, most often, obtained through the use of the electron transport chain in reverse mode, consuming energy.

chemolithoautotroph.

Explanation: Chemolithoautotrophs are organisms that derives energy from reduced compounds of mineral origin, they utilizes inorganic molecules. chemolithoautotrophs are a type of lithotrophs with autotrophic and chemotrophic metabolic pathways. Many chemolithoautotrophs are extremophiles, but this is not true for all species.

cancer   is   essentially   uncontrolled   mitosis   of specialized cells

answer: c. two haploid cells

explanation: