The half-life carbon-14 is 5730 years. archaeologists dig up a seed that contains 0.25 parts per trillion of carbon-14. if it originally contained 1 part per trillion carbon-14, how old is the archaeological specimen?

a) 11,460 years

b) 5730 years

c) 17,190 years

d) 22,920 years

e) 28,650 years

how do you get 11,460 which is the answer of to this problem?

How did the research presented in the article affect scientists' understanding of the evolution of eukaryotes

Awire-hair terrier and a smooth-hair terrier are mated. the offspring produced are 6 wire-hair puppies and 2 smooth-hair puppies. a. what pattern of inheritance best describes this situation? b. what is the genotype(s) of the wire-haired puppies? of the smooth-haired puppies? c. what would be the expected genotype and phenotype ratios of a mating between 2 wire-haired terriers that are heterozygous?

Which of these parts of the membrane large moecules pass through it ?