Which of the following do all food chains in an ecosystem depend on? A.
consumers

B.
competition

C.
decomposers

D.
producers

What material does not melt at any temperature

Great amounts of electromagnetic energy from our sun and other bodies in space travel through space. which is a logical conclusion about these electromagnetic waves? their energy must be very their frequency must be very low these waves can travel without a medium they only travel through a vacuum of space

Classify this reaction: 2al+n2-> aln.