How can a growing animal get calcium to make new bone tissue?

How are carbon dioxide emissions affecting the earths natural cycle of temperature change? plz apex

How many copies of each chromosomes should be present in each of the 4 final haploid versions of gamete?

20. in humans, freckles are dominant to no freckles. trey has no freckles and his wife anna grace has freckles, but her dad doesn't. they want to know what percentage of their kids would look like trey. show a punnett square to support your answer.