Which of the following correctly compares how plant and animal cells differ?
plant cells have chloroplasts and mitochondria for energy, but animal cells do not have mitochondria. plant cells have a cell membrane and cell walls for support, but animal cells do not have cell walls. plant cells have ribosomes for synthesis, while animal cells have the golgi apparatus. plant cells have many small vacuoles for storage while animal cells have one large central vacuole.

Provide one reason why mitosis occurs.

Draw the structure of dna nucleotide with adenine as nitrogenous base

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?