Answer questions 12-16 about fungi, diabetes, housefly classification, thermoregulation, and bean plant classification.

Here are the answers to your questions: 12. Two characteristics of fungi are: They are heterotrophic*, obtaining nutrients by absorption. Their cell walls are made of chitin*. 13. To determine if a urine sample was obtained from a person suffering from diabetes mellitus, you would carry out a Benedict's test. Test: Benedict's test for reducing sugars (glucose). Procedure: Add Benedict's reagent to the urine sample and heat it gently. Result for diabetes mellitus: A color change from blue to green, yellow, orange, or brick-red precipitate indicates the presence of glucose, which is characteristic of diabetes mellitus. 14. Classification of a housefly: Kingdom: Animalia* Phylum: Arthropoda* Class: Insecta* 15. During thermoregulation, the changes that occur in arterioles in the human skin are: Vasodilation: When the body is hot, arterioles widen* to increase blood flow to the skin surface, allowing more heat to be lost by radiation and convection. Vasoconstriction: When the body is cold, arterioles narrow* to reduce blood flow to the skin surface, thereby conserving heat. 16. Giving a reason in each case, the class to which each of the following organisms belong: Bean plant - Class: Dicotyledoneae* (or Magnoliopsida) Reason: It has two cotyledons in its seed, net-veined leaves, and a taproot system*. Bat - Class: Mammalia* Reason: It possesses mammary glands (produces milk), has hair or fur, is warm-blooded, and gives live birth*. 3 done, 2 left today. You're making progress.