Answer: The aluminum atom loses electrons to form an ion.
The ion that is formed is <u>positive</u>
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<u>Second Part of the question:</u> What is the name of the aluminum ion?
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</u>Answer : <u>Al+3</u>
Explanation: <em>An aluminum ion has a charge of +3. It is not a neutral atom. It has a + charge, the electrons must have been taken away (electrons have a negative charge). Since the atomic number is 13, the number of protons is thirteen. In a neutral atom, there would be thirteen electrons. You take away 3. There is 10 electrons in Aluminum Ion. </em>
Attached is the mentioned above table. I found the exercise on the internet.
The correct answer is:
"<span>the information shown is accurate."
When birds breath in, their posterior air sacs inflate with air from the outside, and their anterior air sacs inflate with air from the lungs. When they breath out the air that was then in the posterior air sacs is now pushed to the lungs, and the air that was in the anterior air sacs is expelled through the trachea.</span>
Answer: Keystone species
Explanation: A keystone species is a species which occupied a niche so central in the ecosystem that it has a disproportionately large effect on its environment and other species in it.
The coral's function in its ecosystem is so vital that if you were to remove it, the entire community would be drastically altered beyond recognition.
The coral serves as the base structure of its ecosystem.
That is to say that many corals are hermatypic(they form reefs). This reef serves as the environmental structure of the Coral's ecosystem. Built in and around it is a very biodiverse biotic environment. The coral not only serves as a hiding place and habitat for many marine organisms including fish, clams, lobsters, etc. It serves as resting place for larger animals like turtles and also serves as hunting sites for other animal species.
The most common way of determining a keystone species, is to see what happens when that species is removed from the ecosystem. Coral have shown to be so central to their ecosystem that the bleaching of coral reefs due to tourism and climate change causes a massive loss to biodiversity. And this is quite significant as reefs are the most biodiverse marine habitats.
A divide is the high ground between two drainage basins.
They are different because one is stronger than the other
