Answer:
specificity is an important criteria for screening and diagnostic instruments, the specificity of a test reflects the probability that the screening test will be negative among those who, in fact, do not have a disease.
A test that is 90% specific will identify 90% of patients who do not have the disease. Tests with a high specificity (a high true negative rate) are most useful when the result is positive. A highly specific test can be useful for ruling in patients who have a certain disease.
Explanation:
This is called sexual dimorphism or plumage dimorphism in particular. During mating season male American goldfinches shed and grow bright yellow feather to attract female goldfinches, the brighter the color higher the chance to find a mate.During this season, the male goldfinch is aggressive in attacking males who goes into his territory.
Answer:
Exocytosis is the only form of food/waste expulsion that I know of. I am not sure if those things can simply "pass through" a membrane
it is either A or D let me know
Answer:
True
Explanation:
Physical contamination are foreign objects such as hair, fingernails, broken glasses , jewelries etc that are mixed with food. Although, it is important for a food handler who realizes that he is sick such as having fever, jaundice,wound while working to report such to his supervisor or manager,who will then take necessary action and to avoid risk of contamination; yet not the only cause of physical food contamination.
Physical contamination does not necessarily have to occur until the food handler is sick. It could be as a result of carelessness or not paying attention enough by the food handler . Physical contamination might not at all times cause injury or illness to the customer, yet such could bring discomfort to a customer who notices foreign objects in his food while eating. To avoid risk of physical food contamination, it is important for food handlers to keep jewelries to a minimum, wash fruits and vegetables thoroughly, wear hear neatly tied back, throw out and replace cracked, chipped, or broken dishware, glassware and equipment amongst others.
