Which macromolecule holds more energy/gram than any other biological molecule?

What process allows for the development of haploid sex cells? mitosis meiosis fertilization pollination

How does buring fossil fuels impact does carbon cycle? what large impact does this have on the envirnment?

Asap i will reward you brainliest for best which sentence about protists is accurate? all protists are unicellular and microscopic in nature. they have organelles, so protists are eukaryotic in nature. all protists make their own energy through photosynthesis.