which phrase best describes the process of crossing over ? A) pairs of sister chromatids become linked B) pairs of sister chromatids exchange segments C) pairs of homologous chromosomes become linked D) pairs of homologous chromosomes exchange segments

Click an item in the list or group of pictures at the bottom of the problem and, holding the button down, drag it into the correct position in the answer box. release your mouse button when the item is place. if you change your mind, drag the item to the trashcan. click the trashcan to clear all your answers. label the following topographic map. click on a label below the map to select it, and then click on the appropriate box on the map to place the label. (increments for contour lines is 50 ft).

I’m stuck on this question cuz i’m stupid sksksksk

Crossing over and independent assortment are important activities that occur during meiosis. what is the significance of these activities