What condition in the environment made it more difficult for certain beaks to survive during the beaks of finches lab?

The cluster of developing cells from conception until birth is called an

Is there any species that went extinct in recent years due to natural causes (not caused by human interaction). if so, what caused it?

An animal cell (left) and a plant cell (right) are shown.which organelle, labeled x in the diagram, is found in both plant and animal cells?