Which organisms are producers? (SELECT ALL THAT APPLY.) grass

bear

human

oak tree

fungus

Two friends at different locations want to communicate with each other by sending low energy signals. which of the following methods can they use to communicate? a) produce x-rays using colliding electrons and send them to radios, which capture sound b) send messages using infrared radiation, which travel in the form of waves c) send radio waves through intervening media like radio and television d) produce sound waves using microwaves from heated objects

Why do cells appear different in distilled water than they do in 10% salt water?

Which characteristics can be used to differentiate star systems? check all that apply.