1 3 VARIATION IN CHROMOSOME NUMBER & STRUCTURE 3.1 Chromosome Number in Different Species In higherâ organisms (diploids), members of same species typically have identical numbers of chromosomes in each somatic cell.
1 A block of ice, which usually weighs around 50 pounds, can cost $20 to $35. 2  Samâs Club, for instance, sells their 20-pound bag for $3 a bag. 3  The Ice Factory, located in New Jersey, charges $1.75 for a 7-pound bag; $4.50 for a 20-pound bag; and $8 for a 40-pound bag. The cost of ice will depend on the amount in the bag and the store selling it. 2  A block of ice, which usually weighs around 50 pounds, can cost $20 to $35.
Buy dry ice in block form. Performing school experiments and creating fog effects both require blocks of dry ice. 1  Dry ice also comes in pellet form but is mainly used for dry ice blasting to clean surfaces, or for medical transportation. 2  The price of dry ice ranges anywhere from $1.00 to $3.00 per pound. Plan to pick up dry ice as close to the time you will need it as possible. 2  Since it is constantly changing from solid to gas, it has a very short shelf-life. 3  Every 24 hours, 5-10 pounds of dry ice turns from a solid to a gas.