The <span>correct answer is eutrophication. Eutrophication
is the enrichment of bodies of water with nutrients that encourage plants
growth. It is also called hypertrophication. Eutrophication is caused by human’s
activity in the bodies of water. However, eutrophication is also a natural
process especially in lakes.</span>
Answer:
Option A
Explanation:
While making a Punnet square, The possible gametes produced are:
=> GK (Green and long)
=> Gk (Green and short)
=> gK (Yellow and long)
=> gk (Yellow and short)
The substance is called DNA.
Answer:
Yes, two hydrogen bonds could form between thymine and cytosine.
Explanation:
Cytosine is a pyrimidine base found in both DNA and RNA, and Thymine is a pyrimidine base found in only DNA. Electronegative Oxygen and Nitrogen atoms with free lone pairs are potential hydrogen bond acceptors. Hydrogen atoms attached to very electronegative atoms like Oxygen and Nitrogen have strong partial positive charge and are potential hydrogen bond donors.
One hydrogen bond could form between the C4 carbonyl group on thymine which is a hydrogen bond acceptor and the C4 amino group on cytosine which is a hydrogen bond donor. Also, another hydrogen bond could be formed between N3 of thymine which is a hydrogen bond donor and the N3 of cytosine that is a hydrogen bond acceptor.
It is important to note that hydrogen bond cannot be formed between them because the C2 carbonyl groups found on both bases are both hydrogen bond acceptors.
