<span>The ecosystem has land but with high sea levels</span>
Nitrogenous base DNA consists of four unique nucleotides that each contain one unique nitrogenous base—adenine (A), thymine (T), cytosine (C), or guanine (G).
The specific arrangement of these four bases within the DNA of each organism gives that organism its unique traits; here are the arrangements:
-<u>Adenine</u> is paired with <u>Thymine</u> (think of A for apple and T for tree)
-<u>Cytosine</u> is paired with <u>Guanine</u> (think of C for car and G for garage)
search "DNA base pairs" and go to images for better understanding
A- Gravity. I believe it is gravity since that is the only one that makes sense in this situation. I hope i helped! :)
Answer:
Sadness has sad feeling. for example, if a friend dies, you will cry. that is what sadness is.
Explanation: