The survival of a species depends on its ability to adapt to changes in the environment. A species must be capable of surviving and reproducing despite changes to food sources,
climate, or threats from predators. Which statement correctly describes a way that mutations
increase the likelihood that a species will survive in a changing environment?

answer; i believe the correct answer to the above question is ( friction)

the correct answer is b

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.