Which characteristics must an object possess in order to be considered alive?

In a cladogram' when does a group of organisms branch off

What do isotopes of uranium have the same number of? what do they have a different number of? a) same number of protons; different number of electrons b) same number of protons; different number of neutrons c) same number of electrons; different number of protons d) same number of neutrons; different number of protons

Which of the following types of stars are dim but can have high surface temperatures? giants main sequence stars supergiants dwarfs