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Licemer1 [7]
3 years ago
10

Scientists estimate that there may be up to ____________ species alive today.

Biology
1 answer:
SIZIF [17.4K]3 years ago
5 0
Everything I look at they all say about 8.7....
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Develop a model to illustrate the role of photosynthesis in transforming energy (Use words and/or diagrams.) Include the terms:
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Answer:

Develop a model to illustrate the role of photosynthesis in transforming energy. Include the terms photosynthesis, sun, light energy, chemical .

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The narrative point of view in this excerpt allows the
Mrac [35]

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O Rainsford's impression of the dining room.

Explanation:

Richard Connell's short story "The Most Dangerous Game" revolves around the famed hunter Sanger Rainsford and his change of fortune when he was left stranded in an island famed for hunting humans as a game by the island's barbaric owner General Zaroff.

In the given excerpt, the narrator reveals the <em>"dining room to which Ivan conducted (Rainsford)"</em>. The impression that the hall was <em>"of feudal times with its oaken panels, its high ceiling, its vast refectory table where twoscore men could sit down to eat"</em> reveals the outline of the enormous dining hall where Rainsford was conducted to eat with Zaroff. This narrative point of view allows the reader to experience the impression of the dining room.

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What are the charges both inside and outside of the neuron before you click the stimulate neuron button?
evablogger [386]

Answer:

The charges inside and outside of the neuron before receiving a stimulus are negative and positive, respectively, which corresponds to the transmembrane rest potential.

Explanation:

Neuron is the specialized cell of the nervous system in charge of transmitting electrical impulses. The generation of a nerve impulse in the form of an electric current is due to a change in the transmembrane potential.

<u>Outside the neuron cell, electrical charges are predominantly positive, and the ion with the highest concentration is sodium. In the intracellular space, a great quantity of proteins provide negative charge, and there is a predominance of potassium ions</u>. Under these conditions, the ionic channels are closed.

For this reason, a neuron at rest, before receiving a stimulus, presents positive charges on the outside and negative charges on the inside, and the membrane potential in this condition is estimated at a value of -65 mV.

Once a stimulus is produced, the ionic channels open and Na+ ions enter the cytoplasm, exchanging them for K+, which implies a change in the membrane potential which, on reaching the threshold, produces an action potential and the nerve impulse is produced.

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you won't survive a week without water

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