While looking at a cell under a microscope, a scientist is able to see a biological molecule. this molecule is a nucleic acid with a ladder structure and contains the nitrogenous bases adenine, thymine, cytosine, and guanine. based on this information, what conclusion can the scientist draw regarding this nucleic acid? (2 points) the nucleic acid is rna and would be found in the cell's nucleus. the nucleic acid is rna and would be found in the cytoplasm. the nucleic acid is dna and would be found in the cytoplasm. the nucleic acid is dna and would be found in the cell's nucleus.

Blood has traveled from the heart to the toes. which describes the next step of the circulation process?

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?

What did not occur in the proterozoic eon a)the oxygen levels increase greatly in the atmosphere,b)the emergence of the eukarya , c)muti cella’s eukaryotic organisms began to diversify,d)anaerobic bacteria kept thriving with more oxygen