Which of the following is an advantage angiosperms and gymnosperms have over mosses? they can photosynthesize
they are seed producing so can populate more areas
they can use oxygen
they do not need water

In a voltaic cell, electrons flow from the (positive/negative) to the (positive/negative) terminal.

On a frictionless air track, a blue glider with mass 0.200 kg is moving to the right with a speed of 8.00 m/s. it strikes a red glider that has mass 0.600 kg and that is initially at rest. after the collision, the blue glider is moving to the left with a speed of 3.00 m/s.(a) what are the magnitude and direction of the velocity of the red glider after the collision? (b) is this collision elastic?

When doing scientific research ,the sources used should be ?