¿Por qué la teoría de la panspermia no es sólida? ¿Cuál es su desventaja principal?

Hey me with this one❤❤❤❤ every organism needs food. does a cell also need it? explain very briefly.

What are the most explosive events that occur on the sun? umbras solar flares solar winds prominences

Which statement describes compounds a. compounds are made of one type of atom. b. compounds cannot be represented by models. c. compounds are represented by chemical formulas. d. compounds cannot be broken down into simpler forms.