Answer:
Viruses can infect only certain species of hosts and only certain cells within that host. The molecular basis for this specificity is that a particular surface molecule
So they are cell specific
Explanation:
Answer:
Identical twins came from the same sperm and egg, so they have the same chromosomes and genes. So identical twins with identical DNA may have different genes turned on, causing them to look and act differently, and even to develop different diseases such as cancer.
Explanation:
Plants make proteins in much the same way as all eukaryotic organisms. Amino acids are the building blocks of proteins, and ribosomes add amino acid after amino acid to an elongating peptide chain. ... All synthesis of amino acids is via complicated chains of enzymatic reactions.
Answer: The hypothesis can be completed as-
If the type of food available changes, then the frequency of beak also changes.
Explanation-
Natural selection is a theory of evolution that was given by Charle's Darwin. According to this theory, organisms that are capable of adapting themselves ( that is having beneficial traits, which enhance their survival) in the changing environmental conditions survive and increase their number by means of reproduction.
According to the information given in this question, the type of food available is changing, which will result in the change in the frequency of bird beaks inhabiting that area. This would indicate their adaptation so as to survive under the changed food type, otherwise they will be unable to consume the food resources and will die out.