The half-life of a radioisotope is the time it takes for the radioisotope to become an isotope with one-half of the atomic weight of the original radioisotope. the time it takes for the radioisotope to lose one-half of its neutrons. the time it takes for the radioisotope to become an isotope with one-half the atomic number of the original radioisotope. the time it takes for one-half of the sample to decay. one-half of the time it takes for the radioisotope to completely decay to a nonradioactive isotope.

Which of the following is not a characteristic of carnosaurs? a. long narrow skulls b. strong forelimbs c. horn projecting from their skulls d. none of the above

Approximately 90% of all cases of polycystic kidney disease are inherited in an autosomal dominant fashion. the disease is typically related to mutations to genes (pkd1 and pkd2). pkd genes can be found on chromosome 16. the disease occurs in approximately 1: 800 to 1: 1000 people. here is a hypothetical example. the dominant allele d will cause the development of pkd. the recessive allele is known as d. what genotypes would correspond to suffering from pkd? dd, dd what genotypes would correspond to being normal (not suffering from pkd)? dd consider that 1: 1,000 people have pkd in your population of 325million. consider that pkd is inherited in an autosomal dominant fashion. show you math for all of the following questions: what is the genotypic frequency for dd? what is the genotypic frequency for dd? what is the genotypic frequency for dd? what is p? what is q? how many people in your population would have pkd?

Hedgerows have created a new ecosystem within britain’s a. farms b. cities c. forests d. industrial areas