Answer: c. Producers.
Explanation:
A hydrothermal source is a crack in the earth through which water flows, was heated under the surface by magma. Heat causes water to flow precipitously to the surface. If the crack is on the earth, it is called Geyser, and if it is underwater, it is called fumarole.
Producers are those organisms that synthesize organic matter from inorganic matter, in marine ecosystems marine plants are the primary producers.
For producers to acquire energy, sunlight is necessary, so it was considered impossible for producers to exist in deep waters in the oceans. However, around the fumaroles ecosystems have been found that subsist only with minerals that come from the expelled water, such as sulfur.
I hope this information can help you.
"To the west it is connected to the Da Hinggan Range by the Yilehuli Mountains, which run northwest-southeast for some 375 miles (600 km). ... Although the two ranges have similar names, the Xiao Hinggan is a completely different mountain system from the Da Hinggan (Greater Khingan)."
Answer:
The Supreme Court ruling on Plessy v. Ferguson in 1896 established the "separate but equal" doctrine in the United States public education system.
Explanation:
The case was based on an incident 1892 where Plessy violated the rule by entering the same train cart with whites which was illegal as at then in the state of New Orleans according to the Separate Car Act of 1890. He was charged and his defense was that the segregation of blacks from using the same train car with blacks was a violation of the United States constitution and lost the case. He appealed to the United States Supreme Court and also lost. The Supreme Court ruled that although the Fourteenth Amendment to the constitution establishes both whites and blacks as equal, it could not eliminate other social classifications based on race.
The answer is D.) All of these choices
