Before revision: To transform a single-celled zygote into an adult URLanism, development employs three basic processes --- asymmetric cell division, signaling and gene regulation . These three processes can be combined in a multitude of ways , thus generating the huge diversity of plant and animal forms we see today.
After revision: To transform a single-celled zygote into an adult URLanism, development employs three basic processes --- asymmetric cell division, signaling and gene regulation --- in a multitude of ways , thus generating the huge diversity of plant and animal forms we see today.