(Q).
Q: A binary molecular compound is made up of two of what? Choices: - compounds - cells - wafers - elements A:
(A).
elements

(Q).
Q: Which ancient fish has just two living species and is at risk of extinction? Choices: - latimeria - hominids - squids - coelacanths A:
(A).
coelacanths

(Q).
Q: What is used by sensitive systems to detect even low levels of radiation? Choices: - electrons - radars - ions - crystals A:
(A).
crystals