Answer:
The correct answer is D)
Explanation:
Oxygen is a chemical element which plays a major role in sustaining complex life, and that is mostly produced on Earth through the photosynthesis of plants. Without the constant replenishment of oxygen provided by this biological process, oxygen would be extremely rare in the Earth's atmosphere, as it is too volatile.
This is exactly the situation which the Earth was going through during the first billion years of its existence. Early Earth was mostly devoid of life, so oxygen concentration on the atmosphere was practically zero. The appearance of the first few unicellular beings a few hundred million years later which produced oxygen through photosynthesis had little effect on the concentration of this gas, as most of it oxidized in the atmosphere as soon as it was produced. However, as life diversified and expanded, more and more photosynthetic organisms developed and flourished. A little less than a billion years ago, oxygen concentrations were rising enough to allow the development of more complex life. Today, oxygen concentration in the atmosphere sits at around 21%.
The nurses of the Civil War were an example of <em>compassion and dedication </em>to the cause of the ones in need. The American people have a sense of deep gratitude for the way they attended bodies and renewed the spirit of the soldiers during those difficult moments. With their dedication at work, they deserved the recognition of the medical community and nursing was recognized as a formal and true profession. Nurses like Clara Barton and Jane Woolsey were beyond the clinic camps and shared their experience in Civil War to educate future nurses.
Other Quakers<span> faced </span>persecution<span> in Puritan Massachusetts. In 1656 Mary Fisher and Ann Austin began preaching in Boston. They </span>were<span> considered heretics because of their insistence on individual obedience to the Inner Light. They </span>were<span> imprisoned and banished by the Massachusetts Bay Colony.</span>
Answer:
Humans evolved alongside orangutans, chimpanzees, bonobos, and gorillas.
Women Were Once Banned from Smoking in Public
During the Salem witch trials, the accused witches weren’t actually burned at the stake.
(these were used from some websites rewrite these just in case)
