Give 5 examples of adaptations birds have acquired and explain how they contribute to their ability to fly

Pneumatization/honeycomb structure in bones allows for the birds to weigh less and be buoyantBirds have lightweight feathers on the wings hence allowing for a higher lift to weight ratio. Birds take in very little water in their bodies hence reducing  on the carried weight. This is why birds excrete their waste as uric acid that requires less water to eliminate compared to ammonia Instead of boned jaws, birds have beaks made of keratin which is lightweightThe breastbone of birds is enlarged allowing for the attachment of muscles involved in flight

answer: carbon 14 can only be used to determine the age of the organisms that were once living, and igneous rocks are non living.

explanation:

carbon 14 dating is used to determine the age of the sample by estimating the amount of carbon 14 present in the sample and then comparing it with a reference standard.carbon 14 is a isotope of carbon which is radioactive and unstable. carbon 14 is assimilated by all plants and animals throughout their life from carbon dioxide. however, one the organisms die they stop this assimilation and the carbon 14 content starts to decrease.by knowing how much of carbon 14 is left in an organism after his death, one can estimate the age of the organism. the materials whose age can be estimated by carbon 14 method are the organic compounds. however, some inorganic compounds such as aragonite   shell can also be dated.however, if we consider the igneous rocks it is a non living component which never accumulated carbon 14 in it and thus, we cannot use carbon 14 dating method to estimate its age.