Chapter 2, Problem 1CS

Why are ducks waterproof? It’s because they produce copious amounts of oils from their uropygial glands and spread it across their feathers. In this exercise, we’ll be investigating the molecular structure of one of these preen oils to determine how it keeps ducks dry. Q.5 - Preen oil is actually a complicated mixture of many different organic compounds, such as the structure seen previously.. Ornithologists have determined that birds often use preen oil compounds for scent recognition. Below, several different chemicals isolated from preen oil are shown, along with their vapor pressures at room temperature. p-cymene has the highest vapor pressure, meaning it is the most easily evaporated compound of the three listed. Explain why p-cymene has a higher vapor pressure at room temperature compared to the other compounds. Make sure to explain what holds the p-cymene in the sample. (Image attached)

Determine whether the statements are true or false and could you please leave a short explanation in order for me to understand? Thank you so much! 1. Vitamins are useful in the body in great amounts.2. Vitamins don't have a common sturcture3. There is one type of vitamin B.4. Vitamin D is usually found in citrus fruits.5. There are vitamins that can be produced by the skin with the aid of sunlight.6. Vitamin K can solve fertility problems.7. Some vitamins can be synthesized by the human body.8. Before taking multivitamins, consultation with a doctor is important.9. All vitamins are water-soluble.10. Too much vitamins may be toxic to the body.

Write a paraphrase of the following passages.1. Bats are in the limelight these days because they are rumored to be the source of COVID-19, the virus that caused the coronavirus pandemic. But that is just part of their story. Bats turn out to be miraculous creatures. Their ability to age without decrepitude or cancer, as well as fight off a multitude of infections, are giving us clues about how to do the same for ourselves.