Carbon dioxide and oxygen cannot pass through but move in and out
The red blood cells were placed into an isotonic solution. Water moved into and out of the cells to maintain homeostasis.
Answer:
The question is incomplete.
However, I notice that your question is mainly dealing with
"Nucleotides with a single ring structure"
I tackled that part, also providing explanation to the point you focused on.
Explanation:
Nucleotides are compounds in which nitrogenous bases (purines and pyrimidines) are conjugated to the pentose sugars (ribose or deoxyribose) and at least one phosphate group. Thus a nucleotide consists of a nitrogenous base, pentose sugar and at least one phosphate group.
Examples of the nitrogenous bases are Adenine, Guanine, Thymine, Uracil and Cytosine. Of all, Thymine, Uracil and Cytosine are with single ring, while Adenine and Guanine are double ring structure.
Answer:
Global warming is a change in the earth's climate which makes it heat up. While the greenhouse effect is a natural process that always is happening because of sunlight and the atmosphere.
I hope this is easy enough.
