Which word means the force that attracts a body toward the center of the earth, or toward any other physical body having mass?

(a)  

The roots grav/griev mean what?

(a)  

What is the study of living organisms?

(a)  

The root (a)   means life.

Well, if you're not (a)   , I don't know why you would want to go to a singles party!

Invading enemy soldiers (a)   the homes scattered along the country's border.

The last thing Lindsay wanted was for Lisa to (a)   her again about missing the rent payment.

Because of his mathematical (a)   , Larry was able to figure out in minutes problems that took other students hours.

Tracy has already won the campaign so her constant flattery of others was (a)   .

The climber felt the intense pull of (a)   as she carefully scaled the steep cliff, knowing one wrong move could send her plummeting to the ground below.

The local official's (a)   ended up ruining his opponent's prospect of winning the election.

During his (a)   class, Marcus studied the complex systems of living organisms, including how cells function and interact within the human body.