In dogs, curly tails are dominant over straight tails. If a pure curly-tailed dog is mated with a straight-tailed dog, what percentage of their offspring will have curly tails?

primary succession occurs in essentially lifeless areas regions in which the soil is incapable of sustaining life as a result of such factors as lava flows, newly formed sand dunes, or rocks left from a retreating glacier. secondary succession occurs

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

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

not always but somethings can be reproduced in a laboratory.