Answer:
The fossil record, however, is quite incomplete. Here's one major reason why: Sediment has to cover an organism's remains in order for the long fossilization process to begin. Most organisms decompose before this can happen.
Answer:
Silent mutation: Some mutations that change DNA bases do not have any effect on the sequence of amino acids in the protein. These mutations are called silent mutations and they do not affect the structure or function of the protein because there is no effect on the amino acid sequence.
Answer:
Insulin is an hormone that keeps blood glucose levels from getting too low or too high. After digestion, insulin is released from the pancreas into your bloodstream. What systems are involved in maintaining blood sugar levels?
Circulatory and Endocrine
Explanation:
Circulatory and Endocrine are the ones involved in maintaining blood sugar levels where the endocrine secrets the hormone while the circulatory ensure the delivery to the targeted organ or part of the system
Answer: The change in the structure of the genes or change in the DNA sequence is called mutation. The mutations are of different types that are deletion, rearrangement, insertion and others.
Explanation:
Mutation in which the one to several nucleotides get changed at a point is called point mutation. The point mutation can be in the form of deletion, substitution, and insertion. Deletion will involve the removal of nucleotide that involves the change in the sequence of DNA. When the nucleotide is added to the genome it is called insertion. In deletion and insertion the whole sequence of nucleotides from the point of mutation get displaced this affect the codons in the amino acid sequence which is responsible for protein synthesis so the functioning of the body may get affected by such mutations.
In the case of substitution the new nucleotides are added to the DNA sequence and the one which was already present at that place is removed. So, only one amino acid in the sequence will change so the polypeptide structure will not be affected.
The answer is the option b, Both move molecules from higher
concentration to lower concentration.The process of diffusion is the
movement of molecules due to the difference on concentrations, which
only can occurs in one direction: from high concentration to lower
concentration. Facilitate diffusion is a specific diffusion that
happens in the cells and requires the pass through membrane cell via
transmembrane specific proteins, but that does not change the fact that
it has to be from higher concentrations to lower concentrations regions.
