Which statement best explains an environmental outcome of using fossil fuels for energy? (1 point) When fossil fuels are burned, they release toxic gases into the air that cause pollution and increase global warming.

Fossil fuels produce waste that exposes humans to dangerous levels of radiation.

When fossil fuels are burned, hazardous ash is created and carried through the environment by wind and dropped into nearby lakes and ponds.

Fossil fuels release carbon dioxide which plants use to make food.

Freckles are a dominant trait in humans. both of the girls have the genotype ff for freckles. if either one marries a man with no freckles, what are the chances that their children will have freckles?

What best explains whether bromine (br) or neon (ne) is more likely to form a covalent bond? bromine forms covalent bonds because it has seven valence electrons, but neon has eight valence electrons and already fulfills the octet rule. bromine forms covalent bonds because it has many electron shells, but neon has only two electron shells and is tightly bound to its electrons. neon forms covalent bonds because it can share its valence electrons, but bromine has seven valence electrons and can gain only one more electron. neon forms covalent bonds because it has only two electron shells, but bromine has many electron shells and will lose electrons in order to fulfill the octet rule.

Explain how paleontologists use trilobite fossils as index fossils for various geologic time periods.