Answer:
<u><em>The four correct options are:</em></u>
2.) Atoms cannot be created or destroyed.
3.) Atoms cannot be broken down into smaller pieces.
4.) All atoms of an element are identical.
5.) Chemical reactions cause atoms to be rearranged.
Explanation:
Dalton brought forward the theory and descriptions about an atom. According to Dalton, every matter is made up of atoms. He believed that atoms were the smallest part of matter which cannot be broken down.
The atoms of an element are the same whereas every element has different atoms.
When chemical reactions occur, the atoms rearrange so that compounds can be formed. Compounds are made by a combination of different atoms.
Answer:
When it rains, some water soaks into the ground and some of it collects, forming streams and rivers that eventually flow into the sea. ... Three quarters of planet earth's surface is covered by salt water – the seas and oceans.
Explanation:
Answer:
The excretory system helps the respiratory system by removing carbon dioxide that is produced during respiration (third option).
Explanation:
The lungs are in charge of the breathing process, being the main organ of the respiratory system. Each lung is considered an excretory organ —belonging to the excretory system— since it is capable of eliminating the carbon dioxide (CO₂) produced by the metabolism during expiration.
As a result of the gaseous exchange, the oxygen entering the lungs through the inhaled air passes into the blood, while the CO₂ is removed from the blood. This CO₂ is removed during expiration, which makes the lungs part of the excretory system.
The other options are not correct because:
- <em>The excretory system does </em><u><em>not introduce more oxygen into the lungs</em></u><em>.
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- <em>The </em><u><em>circulation of blood in and out of the lungs</em></u><em> is a function of the circulatory system.
</em>
- <u><em>Urine is not produced by breathing</em></u><em>.</em>
Answer:
8
Explanation:
What is the number of white blood cells permitted in a unit of leukoreduced red cells? 8 g/dL owing to chemotherapy with a drug known to cause bone marrow depression and immunodeficiency.
