An insect is able to walk across the surface of a pond without sinking because of the
a. polarity of the water molecules.
b. process of evaporation.
c. surface tension of the water.
d. adhesion of the insect's feet to the surface of the water.

What is the earliest point in the universe that we can observe? why can’t we see back further than this?

Describe the function of the endomembrane system? what organelles are involved?

Mutt and jeff are running along a path each pushing a cart loaded with rocks. if mutt's wagon has a mass two times greater than jeff's and they want to stay together, arriving at their destination at the same time, what must happen? a) jeff should slow down so mutt can catch up. b) mutt must use half as much force to push his cart. c) mutt must use twice as much force to push his cart. d) mutt and jeff will use the same force, but mutt will take bigger steps.