using formaldehyde and acetaldehyde as your only sources of carbon atoms, show how you could make the following compound. you may find it helpful to review acetal formation (section 20.5).

the answer is; comparing the frequency of collisions with and without the device

this makes the anti-collision system an independent variable and the collisions a dependent variable. if there are fewer collisions with an anti-collision system that without, then it can be stated that the system is a success. essentially, collisions under an anti-collision system are compared with the frequency of collisions by cars with the human drivers.

i believe it is c: genes for body color and wing size are inherited separately from each parent.

since there are no options posted i'll give you a few examples.

a dolphin's flipper, bird's wing, cat's leg.