Answer:
D. nucleus
Explanation:
this is were transcription happens
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.
Answer:
increased the population cal
Amniotic eggs enabled the uncoupling of reproduction and the need for an aquatic habitat.
Amniotic eggs are An air-breathing egg characterized by a shell and extraembryonic membranes. These enclosed the amniote embryo in a private pond during its development and mediated gas-exchange with the external environment.
Advantages of Amniotic eggs are they develop more quickly and to a greater extent prior to hatching. It is free from animal dependency and reproduce on bodies of water at larval stage .The shell of the Amniotic egg provides protection for the developing embryo and allows water retention while still being permeable to gas exchange.
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