Number one is structural and 2 is behavior
Three is structural
Four is structural
The last one behavior
The correct answer is A.primary, because a primary landform is a natural feature on earth's surface.
Answer:
Compound
Explanation:
It is a chemical compound because it is something composed of one or two elements.
The phase contrast microscope uses out-of-phase and in-phase light rays that produce contrast areas allowing scientists to detect even a minute number of protein molecules and focus on the minute internal structures of a particle.
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It comes from a unicellular organism named Chloroplast that produces a green pigment substance called chlorophyll, this where oxygen is produced as a by-product of photosynthesis.
