Which of the following is/are evidence of great transformations of organisms?

a. tiktaalik - a fish that had arm bones similar to all tetrapods (land animals).

b. embryos - where the slits (pharyngeal slits/gill slits) become ear bones in humans, but gills in fish

c. archaeopteryx - a transitional organism that had both bird and dinosaur characteristics

d. completely different genes for every distinct feature between organisms.

What is one affect on the australian environment due to the introduction of non-native european rabbits? (a) more grass grew in response to the need of the growing population of rabbits. (b) the rabbits balance out the food chain as they became a natural prey to many predators. (c) the rabbits the land by digging, which caused the soil to spread much needed nutrients. (d) the rabbits out-competed other small animals species and caused them to go extinct.