'Which food did dinosaurs compete for?' would be impossible to test through observation. The last option.
<h3>What are observations?</h3>
Observation is a process of obtaining information about phenomena using any of the five senses. In other words, observations are a way of obtaining data for scientific purposes.
Why is the question about dinosaurs' food unanswerable by observations? This is basically because dinosaurs can no longer be observed in this our present world.
Dinosaurs are believed to have gone into extinction about 65 million years ago during the Cretaceous period. Thus, unless one can go back in time, there is no way to answer the question of which foods did dinosaurs compete for through observations.
More on observations can be found here: brainly.com/question/28041973
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Answer:
H-<em><u> </u></em><em><u>Honey</u></em> melt and become less consistent, thinner and easy to use.
A- <em><u>Apple juice</u></em> freeze and solidify when cooled.
S- <em><u>Sugar</u></em> melts and becomes liquid and more consistent when heated.
E- <em><u>Egg</u></em> solidify and become hard when heated until boiling point.
C- <em><u>Chocolate</u></em> melt and become liquid when heated.
H- <em><u>Hot chocolate</u></em> solidify when cooled.
A- <em><u>Aqua</u></em> freeze and become solid when cooled at freezing temperature.
N- <em><u>Nutella</u></em> melt and become more consistent liquid when melting.
G- <em><u>Greek yogurt</u></em> solidify and become in crystal forms when cooled.
E- <em><u>Edam</u></em> melts and become more consistent liquid when heated.
Answer: Horizontal gene transfer
Explanation: Horizontal gene transfer is the transfer of genetic material between organisms. Horizontal Gene Transfer is an crucial factor in the evolution of many organisms.
Horizontal gene transfer can occur via three main mechanisms: transformation, transduction or conjugation.
Most DNA is located in the cell nucleus (where it is called nuclear DNA), but a small amount of DNA can also be found in the mitochondria (where it is called mitochondrial DNA or mtDNA).