CaCl: Will give brainliest

Which of the following did jj thompson discover about atoms? a)an atom has an internal structure. b) atoms are tiny indivisible particles. c)electrons orbit the nucleus of an atom. d) the nucleus of an atom contains protons and neutrons.

Design techniques and materials that reduce the negative environmental impact of a structure are referred to as

Which organism develops breathing organism develops breathing organs from pharyngeal arches? shark, spider, sea star, sea horse