单选题 The____ of change in the climate can be difficult to perceive over short periods.

单选题 Over millions of years, species_ to adapt to their changing environments.

单选题 The famous scientist was proud of his ______, who continued his legacy in the field of genetics.

单选题 The scientist was renowned for his contributions to the ______ of quantum mechanics.

单选题 The project was delayed due to the team's constant ______ over minor details.

单选题 Many issues may ______ during the implementation of the new policy, requiring careful monitoring.

单选题 The scientist explained how ____ can cause diseases in humans and animals.

单选题 An ______ is a living thing that has the ability to act or function independently.