Will mark Branliest if correct. (I think B, but I am not sure. It doesn't seem to be D.) What makes mitochondrial DNA useful as a molecular clock? (2 points)

It is only found in select organisms, making it easier to compare relationships between species that have it.

A large portion of the DNA ring is not vital to structure or function, allowing it to accumulate neutral mutations.

Its rate of mutation increases over time as organisms continue to evolve and differentiate from each other.

A slow mutation rate makes it useful for determining evolutionary relationships between ancient species.

Which organelle releases chemicals that break down large food particles into smaller ones?

The picture shows a fishing technique called trawling. how might trawling affect marine biodiversity

Sally and sue were investigating the topic of friction in science. they used a small car and a ramp as seen in the picture to test what they were learning. they knew that they slipped easily on waxed floors but not on carpet, so they decided to change the material on the surface of the ramp to see what happened. they planned to use glass, carpet, aluminum foil, and sandpaper and run the car down the ramp over each surface. what would be the best research question to guide the girls' experiment? a) does the amount of surface area affect the friction on the moving car? b) will the car travel fastest on the glass surface? c) how does the angle of the ramp affect the speed of the car? d)do rougher surfaces tend to create more friction than smooth surfaces?