The correct answer is b. reproduction.
Reproduction is not essential to the survival of a single organism; however, to maintain a species, organisms must reproduce.
Hope this helps! :)
The answer is Lungs. So that air passes from the trachea to one Lungs that is the answer. I hope I helped
Answer:
The number of seeds in cups.
Explanation:
The independent variable is part of the experiment performed by the scientist, so in this case, the independent variable will be the number of seeds in a cup.
EDIT: The actual answer is the <u>number of days</u> and the <u>amount of soil</u>. I read the question wrong. My bad!
The answer would be B. nucleic acids.
I would say salt. I mean 75 % of water is salt water, which is why we use machines too sort out Salt From Fresh!