Answer:
Trilobites
Explanation:
The Phanerozoic Eon is characterized by the presence of organisms that possessed hard shells as an adaptation to the environmental conditions. Among these organisms, the most common hard-shelled animals were the trilobites.
Trilobites were present during most of the Paleozoic Era, which belongs to the Phanerozoic Eon. These animals were marine organisms with remarkable and unique phenotypes.
The body of a trilobite was composed of three segments: the cephalon, the thorax, and the pygidium (tail). In addition, they possessed an exoskeleton composed of chitin, which was the reason behind their hard shells. They shed their exoskeletons to be able to grow.
Trilobites are currently extinct.
Parma and paincho are systems of cooperation because they both allow for social social interaction that allows individuals to cooperate in meeting each other's needs.
In short, parma and paincho mean "give and borrow (or borrow)." Paincho refers to goods and parma to services. they work in a society where people in need of a good (like food, clothing, money, etc.) or some service can ask these things from individuals who are not in need who can give or donate these factors or charge any cost or interest needy, just stipulating a date for the loan to be repaid.
the answer is option c more water was used to produce electricity than to grow crops
The correct answer is D. Violate the informed consent concept of volunteerism
Explanation:
In any research, it is necessary participants agree on participating in the research, after being informed of the purposes, methodology, and details about their participation, this process is called informed consent and it is par to the ethics in research. Additionally, participation should not be forced or influenced by punishments or similar. This implies, in the case presented, the researcher is violating the informed consent concept of volunteerism as she is forcing students to participate in the research to get a grade which means participants do not accept to participate voluntarily.
