Each transport protein is designed to transport a specific substance as needed. Some channel proteins, for example, open only when they receive the correct signal, allowing the substances they transport to flow on demand.
Some genes only need to be expressed or produced when needed. For example, fibrinogen is a protein that needs to be produced when a person needs to clot. A signal protein 'signals' or tells the DNA to start producing that particular protein. Imagine if the protein was produced all of the time at the same quantities...a person would be prone to strokes and other sicknesses that are caused by blocking the flow of blood to tissue.
Answer: Water covers 70% of the earth, so land covers 30%.
during an experiment you make observations to test the hypothesis and prediction
Answer:
their is a 50 prencen chance the kid will have red hair
Explanation:
