Dogs have a reduced nonfunctional digit on their paws known as a dewclaw what is this and example of

Answer;

Vestigial Structure

Explanation;Vestigial Structure are structures that have no apparent function and appear to be residual parts from a past ancestor. Vestigial structures are normally homologous to structures that are functioning normally in other species and therefore may be considered evidence for evolution. Other examples of vestigial structures include; the human appendix, the pelvic bone of a snake, and the wings of flightless birds.

Only algae, oak trees, and bermuda grass produce atp by photosynthesis i am almost positive

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.