To pass oxygen through there gills i own pet fish and I expect them daily so they can be healthy and happy
Answer:
D) The exact mixture of components varies from point to point.
Explanation:
It's important to know that the air is a mixture formed by around 78% of nitrogen, 21% of oxygen, 0.9% of argon, 0.04% of carbon dioxide, and other gases in smaller amounts.
Additionally, the mixture that formed the air is not always the same, it variates depending on several variables, that means the air as such can slightly change is mixture, at some points can have a bit more oxygen or a bit more carbon dioxide. In other words, the air is not a constant mixture.
Having said that, the right answer is D, because the mixture of components can actually vary from point to point.
Answer:
Multicellular organisms are made of more than one cell and are complex organisms.
They are visible to the naked eye.
They possess distinct organs and organ systems.
They are eukaryotes, i.e., they contain membrane-bound structures.
Their cells exhibit division of labor.
Their size increases with the number of cells in an organism
Explanation:
The number who reach sixty years of age will be higher because first of all, there will more and better health services available and the life expectancy of people is expected to rise.
Answer:
The correct answer is C: competition for resources