Which of the following statements correctly relates mutations and survival rates of plants? mutations always improve the chances of survival for a plant. mutations never improve the chances of survival for a plant. mutations sometimes improve the chances of survival for a plant. there is no relationship between mutations and the chance of survival for a plant.

Answer is: Mutations sometimes improve the chances of survival for a plant.
Mutations are very important because they change variability in populations and in that way enable evolutionary change.
There are three types of mutations:
1) good or advantageous mutations -  improve the chances of survival for a plant.
2) bad or deleterious - decrease the chances of survival for a plant.
3) neutral -  not affect he chances of survival for a plant.

Mass is the amount of matter in an object.  weight is the measurement of the pull of gravity on an object.  say for example, you travel to the moon which has a different gravitational field compared to the gravitational field of earth. (gravitational fields: earth = 1, moon = 0.165)  now when you are on the moon, the pull of gravity on you is different than on the earth. and as weight is the measurement of the pull of gravity on an object, that means yes, your weight can and will change on the moon.  however, on the moon, on earth or even on jupiter, the amount of mass inside of you remains the same. meaning your physical mass remains constant.  in conclusion it is possible for your weight to change as your mass remains constant.