You suspect that changes in the hormone levels of a bird are causing it to sing more frequently. this is an example of a(n):
<u>proximate hypothesis</u>
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What is a proximate hypothesis?
An event that is nearest to, or directly accountable for, creating some observed effect is referred to as a proximate cause. This contrasts with a higher-level ultimate cause (also known as a distal cause), which is typically regarded as the "real" cause of an event.
Ex: What caused the ship to sink? A breach beneath the waterline allowed water to enter the hull, making the ship denser than the water that was supporting it, which prevented it from remaining afloat. The ship's collision with a rock, which tore a hole in its hull, was the ultimate reason.
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Answer:
B
Explanation: Most people don't cough when their throat is irritated and it is a reaction.
Answer:
secondary structure ... hydrogen bonds...
Explanation: Some regions of a polypeptide may coil or fold back on themselves. This is called secondary structure, and the coils or folds are held in place by hydrogen bonds.
Answer: Water molecules forming hydrogen bonds with one another. The partial negative charge on the O of one molecule can form a hydrogen bond with the partial positive charge on the hydrogens of other molecules. Water molecules are also attracted to other polar molecules and to ions.
Explanation:
Answer:
change in temperature
change in color
noticeable odor after reaction has begun
formation of precipitate
formation of bubbles