Photosynthetic activity of the algae is vital to the survival of the coral animals, which use the energy to extract calcium from the seawater and
build their calcareous skeletons. The zooxanthellae are protected by the hard coral
and obtain plant nutrients from the coral.

hammurabi rulers

good lesson

a unit of heredity that is transferred from a parent to offspring and is held to determine some characteristic of the offspring.

i believe it's c. the trait for large beaks will be passed on to future generations through natural selection.

since eventually smaller beaks would have to find another source of food or even eventually just die out from the lack of food.