The correct answer is - B. Beak size determines what the bird can eat.
The beak of a bird can come in many different shapes and sizes. It can be pointy, long, short, rounded, scythe-like, thin, thick... All of those shapes and sizes have a specific role, and that role is to enable the bird to feed itself with certain type of food source. Every food source requires certain type of beak in order for the bird to be efficient in getting its nutrition, so depending on hat the bird eats, we can easily see a pattern in the beaks, where birds that eat nuts have one strong and shorter beak, the ones that eat warms and insects have thin, pointy one, the predator birds have claw like, sharp beak...
The answer is <span>c. One that is most easily affected by changes in water quality.
An indicator species is a biological species whose presence or absence and even abundance can indicate specific environmental conditions. For example, there are some species (plant, fish, invertebrates,...) that can live only in an extremely clean river. But, if that clean river gets polluted by human activity, the river will not be any long extremely clean, and sensitive species will not survive and will disappear from the river. Its absence will indicate that river quality is threatened.</span>
Water.
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<span>When a system is behaving erratically, a graph of data measured from the system
</span><span>does not form a pattern.
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Endoplasmic reticulum with attached ribosomes is called rough ER. It looks bumpy under a microscope. The attached ribosomes make proteins that will be used inside the cell and proteins made for export out of the cell.