Urgently answer! i have only a couple minutes to do this!

what would be the main problem with reproduction if meiosis did not take place to form sex cells?

a. the zygote would have two nuclei.
b. fertilization would result in a zygote with half as many chromosomes as the parents.
c. fertilization would result in a zygote with twice as many chromosomes as the parents.
d. the zygote would have no nucleus.

Dna is colied into chromosomes in a cell

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?

How are the testes and ovaries similar? a. both produce sex cells. b. both connect internal reproductive organs to the exterior. c. both transport sex cells from their site of production. d. both store mature sex cells.