The nitrogen cycle is the biogeochemical cycle by which nitrogen is converted into multiple chemical forms as it circulates among atmosphere, terrestrial, and marine ecosystems. ... Important processes in the nitrogen cycle include fixation, ammonification, nitrification, and denitrification.
Cell growth occurs in interphase.
The cell cycle is composed of interphase, mitosis, and cytokinesis. It can be described in five steps.
The first three steps of the cell cycle are called the interphase. This is where the cell grows, the cell matures, and where the cell carries out its life function. The fourth step is mitosis and the fifth step is cytokinesis.
The interphase has three stages. These are Gap 1, synthesis, and Gap 2.
Gap 1 or growth 1 - where the cell grows and functions normally. Cell growth is twice its original size.
Synthesis - where cell duplicates its DNA
Gap 2 or growth 2 - where cell resumes its growth in preparation for division.
Answer is: a secretary smokes a cigarette in a crowded break room.
External cost Is when consuming a good or servise imposes a cost to a third party. In this case, smoking affects other people in break room, causing pollution and health related problems.
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Scientists are perhaps some of the smart few that make up the human population and are never short on knowledge. They research and discover and conduct tests to gain more knowledge, but the answer to your question is stars are huge celestial bodies made mostly of hydrogen and helium that produce light and heat from the churning nuclear forges inside their cores, and scientist know this because of their research.
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