Many deciduous trees have leaves which turn yellow in the fall. what do you suppose is happening in the leaves at the cellular and molecular level? 4. chloroplasts and mitochondria are both are unusual in that they have double membranes and contain their own set of dna. can you think of any explanations for this observation?

Answer 1:

In pre-winter when it begins to get cold, a few plants quit making chlorophyll. Rather, those plants separate chlorophyll into smaller particles. As chlorophyll leaves, different shades begin to show their hues. This is the reason that leaves turn yellow/red in fall.  

Answer 2:

The endosymbiotic hypothesis clarifies why mitochondria and chloroplasts having one of a kind qualities. The two organelles can deliver vitality, have circular DNA, have films like the cell layer and can reproduce by the help of fusion.

a. as the temperature increases, the kinetic energy of the gas molecules increases & the molecules move faster & further away from each other.

b. if you decrease the temperature of a fixed amount of gas at constant pressure, the combined gas law reduces to charles's law. in this case, volume will also decrease.

i think the answer would d