How many half lives has an isotope gone theough if it has 12.5% of the radioactive substance remaining

25. what does meiosis create? haploids or diploid? somatic cells or gametes?

How are the testes and ovaries similar? a. both produce sex cells. b. both connect internal reproductive organs to the exterior. c. both transport sex cells from their site of production. d. both store mature sex cells.

Tides that occur during the new and full moons