HELP ME PLEASE I REALLY NEED HELP EXPLAIN IN YOUR OWN WORDS SHOW WORK PLEASE Be sure to show your work and explain how you got your answer.

Embryos of different species look very similar, which shows that the organisms share a ancestor.

Nebulae are enormous clouds in outer space. they are made mostly of hydrogen gas, helium gas, and dust. some nebulae glow brightly, while others do not. the stars that people see are huge, bright balls of glowing gas. they are made mostly of hydrogen and helium. which statement correctly describes other ways in which nebulae and stars are different? a. stars can form inside a nebula but a nebula can never be produced by any star. b. a star always has a higher density than a nebula. c. stars can never form inside a nebula but a nebula can be produced by any star. d. a nebula always has a higher density than a star.

What natural processes produce large quantities of co2