What is the difference between a primary and secondary group?

Many people try to eliminate fat from their diets. which is one reason it is necessary for humans to eat fat? a. eating fat is the fastest way to get energy. b. fat eliminates triglycerides from the body. c. saturated fats clear out the blood vessels. d. fat nerves transmit signals. , this is for apex in summer school.

In general, characteristics that an organism survive and reproduce become more common over time. what mechanism of evolution causes this?

As an asteroid comes close to earth, it's name will change to? apex