Question: Read this and answer the question

Gram quantities of various copper salts have been taken in suicide attempts and produced acute copper toxicity in humans, possibly due to redox cycling and the generation of reactive oxygen species that damage DNA. Corresponding amounts of copper salts (30 mg/kg) are toxic in animals. A minimum dietary value for healthy growth in rabbits has been reported to be at least 3 ppm in the diet. However, higher concentrations of copper (100 ppm, 200 ppm, or 500 ppm) in the diet of rabbits may favorably influence feed conversion efficiency, growth rates, and carcass dressing percentages.

What is the minimum amount of copper rabbits should have in their diet?
Answer: 3 ppm
Question: Read this and answer the question

In an ecosystem, predation is a biological interaction where a predator (an organism that is hunting) feeds on its prey (the organism that is attacked). Predators may or may not kill their prey prior to feeding on them, but the act of predation often results in the death of the prey and the eventual absorption of the prey's tissue through consumption. Thus predation is often, though not always, carnivory. Other categories of consumption are herbivory (eating parts of plants), fungivory (eating parts of fungi), and detritivory (the consumption of dead organic material (detritus)). All these consumption categories fall under the rubric of consumer-resource systems. It can often be difficult to separate various types of feeding behaviors. For example, some parasitic species prey on a host organism and then lay their eggs on it for their offspring to feed on it while it continues to live in or on its decaying corpse after it has died. The key characteristic of predation however is the predator's direct impact on the prey population. On the other hand, detritivores simply eat dead organic material arising from the decay of dead individuals and have no direct impact on the "donor" organism(s).

What is the key characteristic of predation?
Answer: the predator's direct impact on the prey population
Question: Read this and answer the question

In May 1970, the Revolutionary Intellectuals Seminar was held to bring intellectuals in line with the revolution, while that year's Legislative Review and Amendment united secular and religious law codes, introducing sharia into the legal system. Ruling by decree, the RCC maintained the monarchy's ban on political parties, in May 1970 banned trade unions, and in 1972 outlawed workers' strikes and suspended newspapers. In September 1971, Gaddafi resigned, claiming to be dissatisfied with the pace of reform, but returned to his position within a month. In February 1973, he resigned again, once more returning the following month.

In what year did the Revolutionary Intellectuals Seminar occur?
Answer:
1970