Water! It is the source of all life.
Answer:
D
Explanation:
The immune system can protect you from bacteria and viruses, so I believe the answer would be D.
Each of the species of finches on the Galapagos Islands has its own distinctive beak and ecological niche.
<h2>Reason :</h2>
Darwin observed that the finches evolved thanks to the difference in their habitat. Consistent environmental differences in several habitats on different islands in the Galapagos, the supply of different foods sources (seeds, cactus, insects, and fruit) promotes directional selection on resident finches for optimal beak morphology which maximizes survival under local conditions.
This process has produced more distinct species of finches, all unique to the archipelago. He noticed that every finch species is having a different type of beak, counting on the food available on its island.
To learn more about Darwin's theory:
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Answer:
the conclusion
Explanation:
You could find the answer using the steps of scientific experiment
the steps are:
Get purpose.
build up a hypothesis.
Test the hypothesis and collect data.
Analyze the data.
Draw conclusion.
Communicate results with others
In this case we could see that a student is trying to determine if plant's growth are affected by the type of soil we use, by seeing the steps of the scientific method, we could say that this is the last step of the experiment. So, it is considered as the conclusion.
<span>Increasing rates of work will increase the energy demand of the body. To fulfill the energy needs, the heart needs to pump more blood.
The rate of blood pumped by heart is known as cardiac output while stroke volume is the amount of blood pumped each contraction. It is calculated by: heart rate x stroke volume
The easiest variable to changed to increase the cardiac output would be heart rate. When a person increases his </span><span>rates of work, the heart rate will be increased to increases the cardiac output so the heart can supply the energy needed.</span><span>
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