Answer:
to provide electrical signals to initiate peristalsis
It depends on the integrated activity of its organs
Answer:
A point mutation in the 1st base of a codon
Explanation:
A point mutations are mutations of one base in the DNA sequence. The effects of point mutations might be harmful, beneficial or neutral.
Deletion mutations are frameshift mutation, because they change the reading frame and thus affect the sequence of amino acids produced. Usually, protein changes its structure and function and become useless.
Point mutations at 2nd base of codon are misssense mutations, meaning that the new amino acid is produced, but it can be amino acid with similar properties. That will not affect the function of the protein a lot.
3rd base of a codon are often silent mutations, which means that the sam amino acid is produced (multiple codons can code for the same amino acid).
<u>Answer:</u>
Approximately, the oldest stromatolites are 3.6 billion years old on earth.
<u>Explanation:</u>
- Stromatolites is not only oldest earths fossil but conspiracy in that they are singular visual portal in deep time on earth.
- It is defined as laminated accumulation structure that is they stick up above sea floor .
- Stromatolite buildings includes oldest fossils which are 3.5 billions old when the earth were too unfriendly to support life.
- The study of fossil age, evolutionary, method of formation are known as paleontology.
- These specimens are considered as old fossils which are around 3.4 to 4.1 billions years old.
DNA is like the instruction manual for building and operating a cell.
Before a cell divides, its DNA is replicated (duplicated.) Because the two strands of a DNA molecule have complementary base pairs, the nucleotide sequence of each strand automatically supplies the information needed to produce its partner.
