Help please A species slowly loses numbers and goes
through natural selection until no individuals
are left. This describes what type of
extinction?
A evolved extinction
B. background extinction
C. mass extinction
D. endangered extinction

i believe it is c: genes for body color and wing size are inherited separately from each parent.

blood enters the heart through two large veins, the inferior and superior vena cava, emptying oxygen-poor blood from the body into the right atrium of the heart. as the ventricle contracts, blood leaves the heart through the pulmonic valve, into the pulmonary artery and to the lungs where it is oxygenated.

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.