A biology student caught andtagged 50trout in a small lake. After two weeks, the student caught another 40 trout and foundthat 4 of them were tagged— these 4 had beenin theoriginal sample and were caught a secondtime. Whatis the best estimate of the populationof trout in the lake? What might have contributed to the low numberof tagged trout caughtthe second time? How could the student reducethis factor? please someone help me with this question.

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?

This group of organisms perform the process of ammonifcation. a. herbivores b. decomposers c. carnivores c. plants

Which of the following is a common response to cell signaling?