Which fossil must form before the cast fossil can form?
amber
mold
frozen
petrified

Differences between compact bone and cartilage

Of seawater increases with decrease in the temperature. therefore, the cold water sinks to the deeper layers at the bottom

Why does meiosis produce cells with half the chromosomes? o a. most of the chromosomes are not necessary to keep an organism alive. b. a gamete needs only half the number of chromosomes because two gametes join together. o c. it makes the gametes easier to move around in the organism. o d. it is faster to produce gametes with fewer chromosomes.