QUESTION 5 Match the symbol with the type of symbiotic relationship it represents

symbiotic relationships symbol

symbol

A. Mutualism 1.+/+

B. Commensalism 2.-/-

C. Parasitism 3.+/0

D. Competition 4.+/- one sec

Icant see the pictures 

Answerhave membrane-bound organelles;

The answer is a. that is an exothermic reaction which means it produces heat

Bromine has atomic number  35  which means there are  35 protons  and  44  neutrons to give a total of 79 nucleons. the fact that it's a positive ion means that it has lost an electron; so there'll be  34 electrons.