1. absolute time
2. relative time
spontaneous disintegration of the
atoms of certain isotopes into new
isotopes
dating a rock or mineral by
measuring the proportions of an original
radioactive material and its decay
product
geologic time measured in a
specific duration of years
placing events in chronological
3. radioactive decay
4. radiometric dating
order without reference to their ages
measured in years

Which statement is not an accurate description of meiosis? a) meiosis produces offspring that are genetically diverse. b) meiosis produces offspring that are identical to the parent. c) in sexual reproduction half of the genetic material comes from the father (sperm) and half of the genetic material comes from the mother (egg). d) meiosis decreases the number of chromosomes by half so that when a sperm fertilizes an egg, the resulting zygote has the correct number of chromosomes.

The sea slug that considered to be a photosyntheesizing animal

During crossing-over, a. genetic material is exchanged between nonsister chromatids, resulting in new combinations of alleles. b. nonsister chromatids from each homologous chromosome of a tetrad are exchanged, resulting in new combinations of alleles. c. one homologous chromosome of a tetrad is exchanged with another tetrad, resulting in new combinations of alleles. d. sister chromatids from each homologous chromosome of a tetrad are exchanged, resulting in new combinations of alleles. e. genetic material is exchanged between sister chromatids, resulting in new combinations of alleles.