Quiz Answer Key and Fun Facts
1. Water is the key to life, without it we simply wouldn't exist. It has certain properties that make the molecule so essential to biology such as its polarity and composition. What is responsible for water molecules having a higher boiling point than other molecules of a similar molecular weight?
2. For marine life water is not just the medium of transport but it is the source of oxygen for the organisms' respiratory needs. Water enters a fish through the buccal cavity and the increased pressure causes the water to pass through the gills. What is the name given to the mechanism whereby water flows across the gills in the opposite direction to the blood flow within the gills?
3. Oxygen is transported around the body in the red blood cells. The oxygen combines with the haemoglobin to form oxyhaemoglobin, which dissociates back to its constituent parts when oxygen is needed for respiration. Carbon dioxide also needs to be transported out of the body safely. Carbon dioxide does this by first reacting with water to form which of the following acids?
4. Water is important for all biological organisms including members of the taxonomic Kingdom, Plantae. Water is absorbed from soil by the roots of a plant and this water contains many nutrients. The water travels up the xylem vessels into the leaves. What is the name of the process where water is removed from a plant through pores called stomata?
5. Photosynthesis is the process by which plants use carbon dioxide, water and photon energy (light energy) to form sugars such as glucose. One of the first photosynthetic reactions to take place is the splitting of water by light. What is this called?
6. Water is an important molecule in the process of digestion as it is used to break down large polymers, such as proteins and carbohydrates, into small monomers, such as amino acids and monosaccharides. What is the name given to the breakdown of polymers into monomers by water?
7. The nephrons of the kidney are fantastic structures. The nephron is the site of many different processes and are responsible for the filtration of the blood. A part of the nephron known as the collecting duct has a wall that has a variable permeability. What is the name of the hormone that alters the permeability of this structure?
8. Humans maintain their body temperature using a number of homeostatic mechanisms. Sweating is one example whereby a mixture of water and some dissolved substances is released from the sweat glands onto the surface of the skin. What process is responsible for "drying" the sweat and thus cooling the skin?
9. Many theories have been put forward over the years that aim to explain how water travels up the xylem of a plant. However, one theory has proven to be the most plausible for water transport and it involves which of the following aquatic features?
10. The blood of an organism consists of many cells and useful products. What is the name given to the part of blood that is mainly water and thus carries dissolved nutrients around the body?
Source: Author jonnowales
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