Answer:
Mammals first appeared
Explanation:
The dinosaurs became extinct one million years after the Cenozoic era started. The mammals first appeared as the modern culture first appeared in that era.
Answer:
The most appropriate answer would be The cell will not make functional proteins from that mRNA strand.
The amino acid sequence of the proteins is derived from the nucleotide sequence of the mRNA (messenger ribonucleotide).
If the sequence of mRNA is miscopied, it will change the sequence of amino acids of the protein.
Consequently, the protein may become non-functional.
Answer:
True.
Explanation:
The Chargaff's rules indicate that in the DNA of all living organisms the amount of adenine (A) should be equal to the amount of thymine (T), while the amount of guanine (G) should be equal to the amount of cytosine (C). These rules were useful to describe the structure of the double helix and also enable to describe base patterns that often are associated with specific gene regions (for example, promoter regions are rich in AT). Moreover, an imbalance in the 1:1 equilibrium ratio is associated with mutations that may cause diseases such as cancer.
The way that you could use molecular biology to determine whether these birds have evolved from a shared common ancestor is to take a look at their proteins, RNA, and DNA. Because the more similar these things are in the two types of birds, the more possible it is that they are somewhat connected via a common ancestor.
